The world's most compact calendar?

This calendar packs all 12 months of one year into a super-compact format.
2023  一月
18152229 週日週一週二週三週四週五週六
29162330 週一週二週三週四週五週六週日
310172431 週二週三週四週五週六週日週一
4111825 週三週四週五週六週日週一週二
5121926 週四週五週六週日週一週二週三
6132027 週五週六週日週一週二週三週四
7142128 週六週日週一週二週三週四週五
  • January, March, May, July, August, October and December always have 31 days.
  • April, June, September and November always have 30 days.
  • February has 28 days in normal years, and 29 days in leap years.
  • 2023 was not a leap year.


2021 2022 2023 2024 2025 2026 2027 2028 2029

Examples of how to use the compact calendar

  • Which day of the week will your birthday be on?
    Find the month at the top, and the day number on the left side. The day of the week is indicated where the day number row crosses the month column.
  • How many Sundays are there in May this year?
    Find the Sunday below the May header, and then count the numbers on the left side of the row.
  • When will daylight saving time start in the United States this year?
    Daylight saving time in the United States starts on the second Sunday of March, so if you find Sunday in the March column, you will find the date in the second number column.


esc返回至 2024 年度


  • Place the mouse pointer on a day name to highlight rows and columns.
  • Press the year number to change year (left side for previous year, right side for next).

The origin of this calendar is unknown. It is also referred to as a "one-page calendar". It was popularized in an article by Ethan Siegel, and adapted to web by Even Scharning of Time.is.

Too compact for you? Try our full-format calendar for 2024!

The world's most compact calendar?
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