The world's most compact calendar?

This calendar packs all 12 months of one year into a super-compact format.
2023  1月
18152229 周日周一周二周三周四周五周六
29162330 周一周二周三周四周五周六周日
310172431 周二周三周四周五周六周日周一
4111825 周三周四周五周六周日周一周二
5121926 周四周五周六周日周一周二周三
6132027 周五周六周日周一周二周三周四
7142128 周六周日周一周二周三周四周五
  • 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 is 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转到 2023 年日历


  • Place the mouse pointer on day names to highlight rows and columns.
  • Press the year number to change year.

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 2023!

The world's most compact calendar?
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