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2026-03 has 31 days. 2026-03-01 and 2026-03-15 are Sundays, the 15th is day 74 of 365, and it is ISO week 11. 291 days of that year remain.
The grid opens on this device's month. The green button shows 2026-03-15. Holidays are not marked.
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- Weekday
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- Day of the year
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- Days left
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- ISO week
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- Days in the month
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- Leap year
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Why this exists
A month is what people open to see today, the weekday, and the week number.
The date tools count a span between two days. This page is the month itself.
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01How to use it
The page opens on this device's month and marks today. The green button selects 2026-03-15.
The device button returns to this month. Nothing is saved.
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02What you get
The grid is the month. The week number is the ISO week of that row's Thursday.
The tiles of a chosen day are its weekday, its day of the year, the days left, and its own ISO week.
Entered2026-03-15
2026-03 31 2026-03-01 Sunday 2026-03-15 74 / 365 ISO 11 -
03Worth knowing
A Sunday belongs to the previous ISO week, because ISO weeks begin on Monday.
1900 is not a leap year. 2000 is. This page does not list holidays.
Questions
- QIs 2026-03-15 day 74?
- AYes. It is a Sunday, day 74 of 365, and 291 days remain.
- QWhy is the day week 11 while the row says 12?
- AThe day is ISO week 11. A row that starts on Sunday is numbered 12, because its Thursday is 2026-03-19.
- QDoes February 1900 have 29 days?
- ANo. 1900-02 has 28 days. 2000-02 has 29.
- QAre holidays marked?
- ANo. The grid is only the days of the month.
How this page works it out
This page lays one month out as a grid. 2026-03 has 31 days, and 2026-03-01 and 2026-03-15 are Sundays. The 15th is day 74 of 365, ISO week 11, and 291 days of that year remain.
In this language the week starts on Sunday, so the row that holds the 15th is numbered 12 and that row's Thursday is 2026-03-19. ISO weeks begin on Monday, which is why a Sunday belongs to the previous week. 2024-02 has 29 days, 1900-02 has 28, and 2000-02 has 29.
Holidays are not marked, and there is no list of national days off. The count stays in this browser, and the month you open is not saved.