Birthday across calendar systems
Compare the same Gregorian civil date in several calendars, without treating calendar labels as personality or destiny indicators.
Your inputs
Start with the example values, then replace them with your own. For tables, keep the vertical bar separators and use a dot for decimals.
Calendar conventions can differ. This civil-date conversion does not determine legal deadlines or religious observance; verify those separately.
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Result and workspace
Use the start button to open your result or activity.
How it works
Format the input at UTC noon in Gregorian, Japanese, Hebrew, Persian and Chinese calendars supported by Intl. Local sunset boundaries, historical calendar reforms and religious observance rules are not inferred.
Worked example
These sample results use the original example inputs in the form. They do not change when you edit your inputs; your own result appears in the workspace.
| Calendar | Calendar date |
|---|---|
| gregory | Saturday, January 1, 2000 |
| japanese | Saturday, January 1, 12 Heisei |
| hebrew | Saturday, 23 Tevet 5760 |
| persian | Saturday, Dey 11, 1378 AP |
| chinese | Saturday, Eleventh Month 25, 1999(ji-mao) |
Read the result carefully
Results depend on the values and assumptions shown above. Change one input at a time to see its effect. A blank or unavailable result means the data does not support a calculation; it is not zero.