caldays
Repeating calendar · 1921

Which years have the same calendar as 1921?

The 1921 calendar (common year, starts on Saturday) repeats exactly in 1927, 1938, 1949 and beyond. Reuse an old calendar, or know when your birthday falls on the same weekday again.

How it works

When do calendars repeat?

Two years share an identical calendar when both start on the same day of the week and both have the same leap-year status. There are only 14 possible calendars: 7 starting weekdays × (common or leap).

A common year shifts the next year's start by 1 weekday; a leap year shifts it by 2. Common-year calendars usually return after 6 or 11 years; leap-year calendars repeat every 28 years in a pure Julian cycle (interrupted around century years like 2100 that skip the leap day).

14 matches

Years with the same calendar as 1921

Past (1)

Identical weekday layout for all 12 months — note that moveable holidays (Easter, Eid, Chinese New Year) still fall on different dates.

Check another year

Repeating calendars for nearby years

Frequently asked questions

When can I reuse a 1921 calendar?
The next year with an identical calendar is 1927. The full list: 1927, 1938, 1949, 1955, 1966.
Why do calendars repeat?
There are only 14 possible annual calendars (7 starting weekdays × common/leap). Year-start weekdays advance by 1 (common) or 2 (leap) each year, so the same configuration returns periodically — typically after 6, 11, or 28 years.
Do holidays repeat too?
Fixed-date holidays (Christmas, New Year) fall on the same weekday in matching years. Moveable feasts (Easter, Eid, Diwali, Chinese New Year) follow lunar or lunisolar rules and do NOT repeat with the calendar.
Repeating calendar
1921 repeats in 1927