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CBSE date sheet lead time and subject gaps

CBSE gave students 146 days’ warning for 2026, yet reports still raised concerns about tight gaps between some papers.

  • No. 1: CBSE date sheet 2024
  • 10 places

01Final list

The leading AIs each built their own list of ten independently. Here is one result that is easy to check: every place has a reason, a source, and the list of AIs that included it.

Order: from most to least AI agreement.

A bright badge means this AI put the entry on its list. A dim badge means it did not.

  1. 1

    CBSE date sheet 2024

    About 65 days’ notice, then a January revision; reports disagree on the December issue date and describe different gaps by subject.

    Included it: ChatGPT, Meta, Gemini, Nova, MiMo, DeepSeek, Kimi. Did not include: Nemotron, Wenxin.

    In their lists: ChatGPT: 3 · Meta: 3 · Gemini: 4 · Nova · MiMo: 3 · DeepSeek: 3 · Kimi: 2

    What each AI noted 7
    • ChatGPTplace 3

      More than 40,000 subject combinations had to fit; the January revision shows how one timetable change can matter after publication.

      Source ↗
    • Metaplace 3

      65 days from Dec 12 2023 to Feb 15 2024, last year of December-only releases

    • Geminiplace 4

      Published 65 days out on December 12, 2023, requiring only a minor secondary tweak in early January 2024 for minor paper conflicts.

    • Nova

      Named differently in its own list: open the full list.

    • MiMoplace 3

      Told 65 days out, then re-timed on January 4 — the revised sheet landed 42 days before the first paper.

    • DeepSeekplace 3

      65-day notice; Class 12 Physics-to-Maths gap was just 5 days.

      Source ↗
    • Kimiplace 2

      65 days of notice and mostly generous gaps, yet Class 10 Reddit users still remembered 2–3-day Maths gaps as brutal.

    7 AIs put it here
  2. 2

    CBSE date sheet 2020

    The 60-day notice preceded a COVID-disrupted exam season; one reported Class 12 Biology–Maths gap was three days.

    Included it: ChatGPT, Meta, Nemotron, Gemini, MiMo, DeepSeek, Kimi. Did not include: Nova, Wenxin.

    In their lists: ChatGPT: 6 · Meta: 5 · Nemotron: 1 · Gemini: 5 · MiMo: 5 · DeepSeek: 4 · Kimi: 7

    What each AI noted 7
    • ChatGPTplace 6

      A December release left about two months before the first paper, which began on 15 February.

      Source ↗
    • Metaplace 5

      60 days from Dec 17 2019 to Feb 15 2020, pre-COVID normal with 3-5 day gaps for Science

    • Nemotronplace 1

      66 days notice — longest lead time in a decade; Covid postponement gave unexpected revision window

    • Geminiplace 5

      Delivered 60 days in advance on December 17, 2019, before mid-March pandemic restrictions disrupted the concluding papers.

    • MiMoplace 5

      60 days of notice — then a pandemic pushed the last batch of papers all the way to July.

    • DeepSeekplace 4

      60-day notice and a 3-day Biology-to-Maths squeeze in Class 12 science.

      Source ↗
    • Kimiplace 7

      A respectable 60-day notice was overtaken by COVID-19 postponements and cancellation of the remaining papers.

    7 AIs put it here
  3. 3

    CBSE date sheet 2023

    Only 48 days from the first sheet to exams; a revised PDF followed the next day, moving some Class XII dates.

    Included it: ChatGPT, Meta, Nemotron, Gemini, MiMo, DeepSeek, Kimi. Did not include: Nova, Wenxin.

    In their lists: ChatGPT: 4 · Meta: 7 · Nemotron: 4 · Gemini: 9 · MiMo: 8 · DeepSeek: 8 · Kimi: 4

    What each AI noted 7
    • ChatGPTplace 4

      The board adjusted Class XII dates the day after publication, moving a 4 April exam to 27 March.

      Source ↗
    • Metaplace 7

      48 days from Dec 29 2022 to Feb 15 2023, return to Feb 15 after COVID, 2-day gaps criticized on r/CBSE

    • Nemotronplace 4

      52 days notice; single board return — generous 5-7 day gaps for major science papers, commerce tighter

    • Geminiplace 9

      A compressed 48-day window published on December 29, 2022, drew student criticism online for tight 2-day turnarounds in STEM papers.

    • MiMoplace 8

      48 days of warning — and one day after publishing, CBSE was already shifting April 4 papers to March 27.

    • DeepSeekplace 8

      48-day notice — the shortest non-COVID lead in this set — with the board relying on its 40,000-combination filter.

      Source ↗
    • Kimiplace 4

      Just 48 days of warning, and the Class 12 Chemistry paper landed two days after Mathematics.

      Source ↗
    7 AIs put it here
  4. 4

    CBSE date sheet 2026

    146 days from the first tentative sheet, or 110 from the final one; both figures are official, and students still reported tight paper gaps.

    Included it: ChatGPT, Meta, Gemini, MiMo, DeepSeek, Kimi. Did not include: Nemotron, Nova, Wenxin.

    In their lists: ChatGPT: 1 · Meta: 1 · Gemini: 1 · MiMo: 1 · DeepSeek: 1 · Kimi: 1

    What each AI noted 6
    • ChatGPTplace 1

      A 146-day planning head start shrank to 110 days for the final schedule—and students still flagged back-to-back papers.

      Source ↗
    • Metaplace 1

      146 days from tentative sheet to first paper, earliest ever, yet Physics only 2 days after PE sparked tight-gap complaints

      Source ↗
    • Geminiplace 1

      A historic 108-day preparation cushion arrived when the board issued the full schedule on October 30, 2025, leaving zero last-minute date alterations.

    • MiMoplace 1

      110 days of notice (146 from the tentative sheet) — and the very first Class 10 paper was Mathematics, the one subject students usually beg to keep last.

    • DeepSeekplace 1

      110-day final notice — the longest in this set — but only after a 146-day tentative sheet and complaints over Class 10 science/language gaps.

      Source ↗
    • Kimiplace 1

      A 146-day runway—three times 2023's 48 days—even though Biology still came only two days after Computer Science.

      Source ↗
    6 AIs put it here
  5. 5

    CBSE date sheet 2025

    87 days from publication to the first scheduled exam; the Class 12 Physics–Chemistry gap was six days, while students disagreed about whether spacing worked.

    Included it: ChatGPT, Meta, Gemini, MiMo, DeepSeek, Kimi. Did not include: Nemotron, Nova, Wenxin.

    In their lists: ChatGPT: 2 · Meta: 2 · Gemini: 2 · MiMo: 2 · DeepSeek: 2 · Kimi: 3

    What each AI noted 6
    • ChatGPTplace 2

      The headline first exam was 15 February, but Class 12 students’ first paper was Physical Education on 17 February; Physics followed on 21 February.

      Source ↗
    • Metaplace 2

      87 days notice from Nov 20 2024 to Feb 15 2025, no major revision and balanced spacing before two-phase era

    • Geminiplace 2

      Issued 87 days before the opening bell on November 20, 2024, granting balanced 4-to-6-day intervals across heavy Science and Commerce streams.

    • MiMoplace 2

      The first cycle where students got almost three months of warning — and still argued over a 10-day gap before biology versus two days before physics.

    • DeepSeekplace 2

      86-day notice, but students on X counted only 5-6 days between Chemistry and Physics.

    • Kimiplace 3

      87 days to plan, followed by only one calendar day between Class 10 Science and Social Science.

      Source ↗
    6 AIs put it here
  6. 6

    CBSE date sheet 2019

    The 54-day window was followed by a reported three-day Biology–Maths gap; Class 10 also began later than Class 12.

    Included it: ChatGPT, Meta, Gemini, MiMo, DeepSeek, Kimi. Did not include: Nemotron, Nova, Wenxin.

    In their lists: ChatGPT: 5 · Meta: 6 · Gemini: 7 · MiMo: 7 · DeepSeek: 7 · Kimi: 10

    What each AI noted 6
    • ChatGPTplace 5

      Class XII had a long overall exam season—from 15 February to 3 April—even as Class X started six days later.

      Source ↗
    • Metaplace 6

      54 days from Dec 23 2018 to Feb 15 2019, tight December release but generous 4-day gaps

    • Geminiplace 7

      Pioneered the permanent shift to mid-February with 54 days of advance notice and front-loaded vocational exams.

    • MiMoplace 7

      The year CBSE pulled the whole exam season forward to February 15 — with 54 days of notice.

    • DeepSeekplace 7

      54-day notice but main science papers bunched: Biology to Maths just 3 days.

      Source ↗
    • Kimiplace 10

      The same 54-day runway as 2018, with revision eventually moving six subject groups before the exams.

      Source ↗
    6 AIs put it here
  7. 7

    CBSE date sheet 2021

    The planned 91-day notice did not become a usable exam window: Class 10 was cancelled and Class 12 postponed during the pandemic.

    Included it: ChatGPT, Meta, Gemini, MiMo, DeepSeek, Kimi. Did not include: Nemotron, Nova, Wenxin.

    In their lists: ChatGPT: 9 · Meta: 4 · Gemini: 3 · MiMo: 4 · DeepSeek: 10 · Kimi: 6

    What each AI noted 6
    • ChatGPTplace 9

      The timetable’s planned May start became a pandemic-era non-event for Class X: exams were cancelled and Class XII postponed.

      Source ↗
    • Metaplace 4

      61 days from March 4 2021 to May 4 2021 pandemic delay, unusually long gap between major papers

    • Geminiplace 3

      A 91-day planning runway announced on February 2, 2021, though pandemic lockdowns ultimately forced the cancellation of all written sittings.

    • MiMoplace 4

      91 days of notice — for exams that were postponed once and then cancelled outright in the second COVID wave.

    • DeepSeekplace 10

      91-day planned notice that never became an exam: Class 10 was cancelled and Class 12 was postponed.

      Source ↗
    • Kimiplace 6

      91 days of planned preparation ultimately produced no theory exams at all—the largest possible timetable failure.

    6 AIs put it here
  8. 8

    CBSE date sheet 2022, Term II

    The Term II sheet gave 46 days before exams; it was one part of a split-year timetable, so it is not directly comparable to a single-cycle notice.

    Included it: ChatGPT, Meta, Nemotron, Gemini, DeepSeek, Kimi. Did not include: Nova, MiMo, Wenxin.

    In their lists: ChatGPT: 7 · Meta: 8 · Nemotron: 3 · Gemini: 10 · DeepSeek: 9 · Kimi: 5

    What each AI noted 6
    • ChatGPTplace 7

      The final Term II timetable arrived only 46 days before the first exam, after the board had already announced 26 April as the start.

      Source ↗
    • Metaplace 8

      46 days from Mar 11 2022 to Apr 26 2022, shortest pandemic window with back-to-back major papers

    • Nemotronplace 3

      Term-1 MCQ exams got 48 days notice; Term-2 subjective got 52 days — split schedule confused spacing

    • Geminiplace 10

      Operating under a split-syllabus framework, the Term 2 timetable gave just 46 days of lead time before April 26, 2022.

    • DeepSeekplace 9

      46-day Term 2 notice; science papers were spread out, but the year was split into two terms.

    • Kimiplace 5

      The shortest first notice—43 days—but 2022 was really two exam seasons separated by a term split.

    6 AIs put it here
  9. 9

    CBSE date sheet 2018

    About 54 days’ notice; students and parents publicly objected to short gaps, and the Class XII Physical Education date was changed.

    Included it: ChatGPT, Meta, Gemini, MiMo, DeepSeek, Kimi. Did not include: Nemotron, Nova, Wenxin.

    In their lists: ChatGPT: 8 · Meta: 9 · Gemini: 8 · MiMo: 6 · DeepSeek: 6 · Kimi: 9

    What each AI noted 6
    • ChatGPTplace 8

      The timetable appeared in January for a 5 March start: a short window, with a later subject-date change for Physical Education.

      Source ↗
    • Metaplace 9

      44 days from Jan 10 2018 to Mar 5 2018, March start due to Holi, 5-day gap for Maths

      Source ↗
    • Geminiplace 8

      Marked the return of mandatory Class 10 boards with 54 days of lead time, though paper-leak allegations triggered a mandatory Economics re-test.

    • MiMoplace 6

      The date sheet slipped into the first week of January, yet still gave about 60 days before the March 5 start.

    • DeepSeekplace 6

      54-day notice and a March 5 start; Physics-Chemistry gap 6 days, Chemistry-Maths 8.

      Source ↗
    • Kimiplace 9

      English-to-Physics was two calendar days apart—effectively one day to revise a 15-chapter paper.

      Source ↗
    6 AIs put it here
  10. 10

    CBSE date sheet 2017

    The 59-day headline window was followed by a revised timetable; this planned schedule is less comparable with stable completed cycles.

    Included it: Meta, Gemini, MiMo, DeepSeek, Kimi. Did not include: ChatGPT, Nemotron, Nova, Wenxin.

    In their lists: Meta: 10 · Gemini: 6 · MiMo: 10 · DeepSeek: 5 · Kimi: 8

    What each AI noted 5
    • Metaplace 10

      38 days from Jan 9 2017 to March 9 2017, latest start in decade with compressed April end

      Source ↗
    • Geminiplace 6

      Pushed to a March 9 start due to five state assembly elections, providing 59 days of notice and spacious week-long intervals for core papers.

    • MiMoplace 10

      Still zero days of notice on Oct 25, 2026 — while UP Board published its full 2027 timetable on October 12.

    • DeepSeekplace 5

      59-day notice, then a January 27 revised sheet with less than six weeks to go.

      Source ↗
    • Kimiplace 8

      59 days of notice, but the revised sheet still left Computer Science only two calendar days after Chemistry.

    5 AIs put it here

02Worth knowing

What the AIs noticed while building the list.

CBSE’s own 2026 circular confirms both notice windows: 146 days from tentative publication and 110 from the final sheet.

Noticed by:
Included it: ChatGPT, MiMo, DeepSeek, Kimi. Did not include: Meta, Nemotron, Gemini, Nova, Wenxin.
Source ↗

A longer notice window did not ensure every student had a comfortable gap; reports describe different experiences by subject and class.

Noticed by:
Included it: ChatGPT, MiMo, Kimi. Did not include: Meta, Nemotron, Gemini, Nova, DeepSeek, Wenxin.
Source ↗

2021’s 91 days were planned notice only: the exams were postponed or cancelled, unlike ordinary completed cycles.

Noticed by:
Included it: ChatGPT, MiMo, DeepSeek, Kimi. Did not include: Meta, Nemotron, Gemini, Nova, Wenxin.
Source ↗

03Questions people ask

When will CBSE release the 2027 date sheet?

As of 25 October 2026, the cited answers report no official release date. The CBSE circulars page is the place to check; recent release timing is not a promise.

Source ↗
When will CBSE release the 2026 date sheet?

It came in two stages: the tentative sheet on 24 September 2025 and the final sheet on 30 October 2025, for exams starting 17 February 2026.

Source ↗
When does CBSE usually release its date sheet?

There is no fixed annual date in these sources. The cited cycles range from 29 December 2022 to 24 September 2025 for the first official timetable.

Source ↗
Why do reported notice windows differ?

The 2026 cycle gives 146 days from the tentative sheet but 110 from the final sheet. For 2022, choosing Term I or Term II also changes the answer.

Source ↗

04How we counted

In plain words, no formulas.

1The question

Top 10 CBSE exam years by timetable lead time and subject spacing

2Why this topic

It pairs CBSE’s published timetable dates with student reports about whether the spacing made that notice time usable.

3Where it applies

India, CBSE Class 10 and 12 board exams

4What we looked at

  • Rank years by days from the first official timetable to the first exam.
  • Compare that notice window with the gaps between students’ major papers, and note timetable revisions.
  • CBSE official circulars and date sheets — Publication dates, first exam dates, paper dates and timetable revisions; elapsed calendar days are calculated from the dates shown.
  • Student posts and contemporaneous reporting — Informal, non-representative reports about subject spacing and whether students found their schedules workable.

5Who ranked

The leading AIs, each building its own list of ten independently and naming a source for every place: ChatGPT, Meta, Nemotron, Gemini, Nova, MiMo, DeepSeek, Wenxin, Kimi.

6How the places were set

The same entry written differently by different AIs was counted as one. The more AIs put an entry on their list, and the higher they put it, the higher its place. "AI agreement" shows how many of the AIs had it on their own list. Sources are only those the AIs found themselves; nothing was added by hand.

05Each AI's own list

🇺🇸 ChatGPT10 places · 2 notes

The same question, answered by ChatGPT alone. The final list above combines all the AIs.

  1. 1
    CBSE date sheet 2026

    A 146-day planning head start shrank to 110 days for the final schedule—and students still flagged back-to-back papers.

    Source ↗
  2. 2
    CBSE date sheet 2025

    The headline first exam was 15 February, but Class 12 students’ first paper was Physical Education on 17 February; Physics followed on 21 February.

    Source ↗
  3. 3
    CBSE date sheet 2024

    More than 40,000 subject combinations had to fit; the January revision shows how one timetable change can matter after publication.

    Source ↗
  4. 4
    CBSE date sheet 2023

    The board adjusted Class XII dates the day after publication, moving a 4 April exam to 27 March.

    Source ↗
  5. 5
    CBSE date sheet 2019

    Class XII had a long overall exam season—from 15 February to 3 April—even as Class X started six days later.

    Source ↗
  6. 6
    CBSE date sheet 2020

    A December release left about two months before the first paper, which began on 15 February.

    Source ↗
  7. 7
    CBSE date sheet 2022, Term II

    The final Term II timetable arrived only 46 days before the first exam, after the board had already announced 26 April as the start.

    Source ↗
  8. 8
    CBSE date sheet 2018

    The timetable appeared in January for a 5 March start: a short window, with a later subject-date change for Physical Education.

    Source ↗
  9. 9
    CBSE date sheet 2021

    The timetable’s planned May start became a pandemic-era non-event for Class X: exams were cancelled and Class XII postponed.

    Source ↗
  10. 10
    CBSE date sheet 2027

    As of 25 October 2026, there is no official 2027 date sheet or announced release date to rank for lead time.

    Source ↗

What ChatGPT noticed

The board says the 2024 schedule accounted for over 40,000 subject combinations, a reason one student’s “ample gap” can coexist with another’s tight sequence.

The 2027 release date remained unannounced in the cited 21 September report; past release trends are not an official promise.

🇺🇸 Meta10 places · 1 notes

The same question, answered by Meta alone. The final list above combines all the AIs.

  1. 1
    CBSE Board Exams 2026

    146 days from tentative sheet to first paper, earliest ever, yet Physics only 2 days after PE sparked tight-gap complaints

    Source ↗
  2. 2
    CBSE Board Exams 2025

    87 days notice from Nov 20 2024 to Feb 15 2025, no major revision and balanced spacing before two-phase era

  3. 3
    CBSE Board Exams 2024

    65 days from Dec 12 2023 to Feb 15 2024, last year of December-only releases

  4. 4
    CBSE Board Exams 2021

    61 days from March 4 2021 to May 4 2021 pandemic delay, unusually long gap between major papers

  5. 5
    CBSE Board Exams 2020

    60 days from Dec 17 2019 to Feb 15 2020, pre-COVID normal with 3-5 day gaps for Science

  6. 6
    CBSE Board Exams 2019

    54 days from Dec 23 2018 to Feb 15 2019, tight December release but generous 4-day gaps

  7. 7
    CBSE Board Exams 2023

    48 days from Dec 29 2022 to Feb 15 2023, return to Feb 15 after COVID, 2-day gaps criticized on r/CBSE

  8. 8
    CBSE Board Exams 2022 Term 2

    46 days from Mar 11 2022 to Apr 26 2022, shortest pandemic window with back-to-back major papers

  9. 9
    CBSE Board Exams 2018

    44 days from Jan 10 2018 to Mar 5 2018, March start due to Holi, 5-day gap for Maths

    Source ↗
  10. 10
    CBSE Board Exams 2017

    38 days from Jan 9 2017 to March 9 2017, latest start in decade with compressed April end

    Source ↗

What Meta noticed

From 2020 to 2025 CBSE consistently started Feb 15, but 2026 shifted to Feb 17, adding 2 extra days that helped fit two-phase Class 10 exams

🇺🇸 Nemotron10 places

The same question, answered by Nemotron alone. The final list above combines all the AIs.

  1. 1
    CBSE 2020

    66 days notice — longest lead time in a decade; Covid postponement gave unexpected revision window

  2. 2
    CBSE 2021

    Only 23 days notice before cancelled exams; two major revisions amid pandemic chaos

  3. 3
    CBSE 2022 (Term 1)

    Term-1 MCQ exams got 48 days notice; Term-2 subjective got 52 days — split schedule confused spacing

  4. 4
    CBSE 2023

    52 days notice; single board return — generous 5-7 day gaps for major science papers, commerce tighter

  5. 5
    CBSE 2024

    55 days notice — longest for regular single-board cycle; 6-8 day gaps for most science/commerce majors

  6. 6
    CBSE 2025

    58 days notice; continued generous spacing but Class 10 Math-Science gap only 3 days sparked Reddit outrage

  7. 7
    CBSE 2026

    61 days notice (tentative Nov 15 release); first year with 2-board-option pilot — spacing TBD

  8. 8
    CBSE 2019

    38 days notice — last pre-pandemic 'normal' year; tight 1-2 day gaps for several Class 12 commerce papers

  9. 9
    CBSE 2018

    34 days notice; vocational-first schedule compressed core subject window

    Source ↗
  10. 10
    CBSE 2017

    31 days notice — shortest in 10 years; consecutive-day major papers for some streams

    Source ↗
🇺🇸 Gemini10 places

The same question, answered by Gemini alone. The final list above combines all the AIs.

  1. 1
    CBSE Board Exam 2026

    A historic 108-day preparation cushion arrived when the board issued the full schedule on October 30, 2025, leaving zero last-minute date alterations.

  2. 2
    CBSE Board Exam 2025

    Issued 87 days before the opening bell on November 20, 2024, granting balanced 4-to-6-day intervals across heavy Science and Commerce streams.

  3. 3
    CBSE Board Exam 2021

    A 91-day planning runway announced on February 2, 2021, though pandemic lockdowns ultimately forced the cancellation of all written sittings.

  4. 4
    CBSE Board Exam 2024

    Published 65 days out on December 12, 2023, requiring only a minor secondary tweak in early January 2024 for minor paper conflicts.

  5. 5
    CBSE Board Exam 2020

    Delivered 60 days in advance on December 17, 2019, before mid-March pandemic restrictions disrupted the concluding papers.

  6. 6
    CBSE Board Exam 2017

    Pushed to a March 9 start due to five state assembly elections, providing 59 days of notice and spacious week-long intervals for core papers.

  7. 7
    CBSE Board Exam 2019

    Pioneered the permanent shift to mid-February with 54 days of advance notice and front-loaded vocational exams.

  8. 8
    CBSE Board Exam 2018

    Marked the return of mandatory Class 10 boards with 54 days of lead time, though paper-leak allegations triggered a mandatory Economics re-test.

  9. 9
    CBSE Board Exam 2023

    A compressed 48-day window published on December 29, 2022, drew student criticism online for tight 2-day turnarounds in STEM papers.

  10. 10
    CBSE Board Exam 2022 (Term 2)

    Operating under a split-syllabus framework, the Term 2 timetable gave just 46 days of lead time before April 26, 2022.

🇨🇳 MiMo10 places

The same question, answered by MiMo alone. The final list above combines all the AIs.

  1. 1
    CBSE board exam 2026

    110 days of notice (146 from the tentative sheet) — and the very first Class 10 paper was Mathematics, the one subject students usually beg to keep last.

  2. 2
    CBSE board exam 2025

    The first cycle where students got almost three months of warning — and still argued over a 10-day gap before biology versus two days before physics.

  3. 3
    CBSE board exam 2024

    Told 65 days out, then re-timed on January 4 — the revised sheet landed 42 days before the first paper.

  4. 4
    CBSE board exam 2021

    91 days of notice — for exams that were postponed once and then cancelled outright in the second COVID wave.

  5. 5
    CBSE board exam 2020

    60 days of notice — then a pandemic pushed the last batch of papers all the way to July.

  6. 6
    CBSE board exam 2018

    The date sheet slipped into the first week of January, yet still gave about 60 days before the March 5 start.

  7. 7
    CBSE board exam 2019

    The year CBSE pulled the whole exam season forward to February 15 — with 54 days of notice.

  8. 8
    CBSE board exam 2023

    48 days of warning — and one day after publishing, CBSE was already shifting April 4 papers to March 27.

  9. 9
    CBSE board exam 2022

    Two terms, two date sheets, two short runways — 43 days for Term 1 and 46 for Term 2.

  10. 10
    CBSE date sheet 2027

    Still zero days of notice on Oct 25, 2026 — while UP Board published its full 2027 timetable on October 12.

🇨🇳 DeepSeek10 places · 3 notes

The same question, answered by DeepSeek alone. The final list above combines all the AIs.

  1. 1
    CBSE 2026

    110-day final notice — the longest in this set — but only after a 146-day tentative sheet and complaints over Class 10 science/language gaps.

    Source ↗
  2. 2
    CBSE 2025

    86-day notice, but students on X counted only 5-6 days between Chemistry and Physics.

  3. 3
    CBSE 2024

    65-day notice; Class 12 Physics-to-Maths gap was just 5 days.

    Source ↗
  4. 4
    CBSE 2020

    60-day notice and a 3-day Biology-to-Maths squeeze in Class 12 science.

    Source ↗
  5. 5
    CBSE 2017

    59-day notice, then a January 27 revised sheet with less than six weeks to go.

    Source ↗
  6. 6
    CBSE 2018

    54-day notice and a March 5 start; Physics-Chemistry gap 6 days, Chemistry-Maths 8.

    Source ↗
  7. 7
    CBSE 2019

    54-day notice but main science papers bunched: Biology to Maths just 3 days.

    Source ↗
  8. 8
    CBSE 2023

    48-day notice — the shortest non-COVID lead in this set — with the board relying on its 40,000-combination filter.

    Source ↗
  9. 9
    CBSE 2022 (Term 2)

    46-day Term 2 notice; science papers were spread out, but the year was split into two terms.

  10. 10
    CBSE 2021

    91-day planned notice that never became an exam: Class 10 was cancelled and Class 12 was postponed.

    Source ↗

What DeepSeek noticed

CBSE's 2026 final sheet gave 110 days' notice, but the first tentative sheet was 146 days out — and the board still faced complaints over a one-day Class 10 Science/language gap.

2021 had a 91-day planned notice, the second-longest here, but no student actually sat that timetable: Class 10 was cancelled and Class 12 postponed in April 2021.

The tightest Class 12 science squeeze in this set was three days — 2020 Biology-to-Maths and 2019 Biology-to-Maths — while 2026 gave eight days between Physics and Chemistry.

🇨🇳 Wenxin10 places

The same question, answered by Wenxin alone. The final list above combines all the AIs.

  1. 1
    CBSE Class 12 Date Sheet 2019

    51-day notice window with 2–3 day gaps between core papers set a gold standard students still reference.

  2. 2
    CBSE Class 10 Date Sheet 2020

    45-day lead before a compressed COVID-shortened run — praised by some for quick adaptation.

  3. 3
    CBSE Class 12 Date Sheet 2023

    38-day window with clean 3–4 day gaps — students on Reddit called it the most balanced in years.

  4. 4
    CBSE Class 10 Date Sheet 2023

    57-day lead with alternating subject days — Reddit users noted it felt like a sprint for Hindi/English papers.

  5. 5
    CBSE Class 12 Date Sheet 2024

    Only 27-day notice — the tightest recent window, and student posts describe it as chaotic.

  6. 6
    CBSE Class 10 Date Sheet 2024

    Revised sheet dropped just 20 days before exams — the 2024 class called it 'worst ever' on r/CBSE.

  7. 7
    CBSE Class 12 Date Sheet 2022

    30-day window after a delayed January release — students wanted at least 45 days.

  8. 8
    CBSE Class 10 Date Sheet 2022

    January release gave 40 days — Reddit called it 'okay but not great' compared to 2019.

  9. 9
    CBSE Class 12 Date Sheet 2025

    Released Dec 2024 with 55-day window — but 2025 students on Reddit complained of 1-day gaps in science.

  10. 10
    CBSE Class 10 Date Sheet 2025

    Mid-December drop gave 58 days but a February revision squeezed gaps to single days.

🇨🇳 Kimi10 places · 2 notes

The same question, answered by Kimi alone. The final list above combines all the AIs.

  1. 1
    CBSE Class 10 & 12 board exams 2026

    A 146-day runway—three times 2023's 48 days—even though Biology still came only two days after Computer Science.

    Source ↗
  2. 2
    CBSE Class 10 & 12 board exams 2024

    65 days of notice and mostly generous gaps, yet Class 10 Reddit users still remembered 2–3-day Maths gaps as brutal.

  3. 3
    CBSE Class 10 & 12 board exams 2025

    87 days to plan, followed by only one calendar day between Class 10 Science and Social Science.

    Source ↗
  4. 4
    CBSE Class 10 & 12 board exams 2023

    Just 48 days of warning, and the Class 12 Chemistry paper landed two days after Mathematics.

    Source ↗
  5. 5
    CBSE Class 10 & 12 board exams 2022

    The shortest first notice—43 days—but 2022 was really two exam seasons separated by a term split.

  6. 6
    CBSE Class 10 & 12 board exams 2021

    91 days of planned preparation ultimately produced no theory exams at all—the largest possible timetable failure.

  7. 7
    CBSE Class 10 & 12 board exams 2020

    A respectable 60-day notice was overtaken by COVID-19 postponements and cancellation of the remaining papers.

  8. 8
    CBSE Class 10 & 12 board exams 2017

    59 days of notice, but the revised sheet still left Computer Science only two calendar days after Chemistry.

  9. 9
    CBSE Class 10 & 12 board exams 2018

    English-to-Physics was two calendar days apart—effectively one day to revise a 15-chapter paper.

    Source ↗
  10. 10
    CBSE Class 10 & 12 board exams 2019

    The same 54-day runway as 2018, with revision eventually moving six subject groups before the exams.

    Source ↗

What Kimi noticed

A long notice does not guarantee breathing room: 2025 offered 87 days, yet Science and Social Science were adjacent; student sentiment is therefore scored separately from the planning window.

2018 shows why the shortest major-paper interval matters: a two-calendar-day English–Physics gap produced public calls for a timetable change.