Enter a date in the Gregorian, Persian (Jalali/Shamsi), Hebrew, or Chinese calendar, and see it instantly converted into all four, along with the day of the week. Pick which calendar you're entering the date in, then fill in the year, month, and day of that calendar - not any other.
Only tick this for a Chinese calendar year that has an extra, repeated month - most years don't.
Hebrew calendar months are numbered 1-13: month 6 ("Adar I") exists only in a leap year; month 7 ("Adar" or, in a leap year, "Adar II") always exists.
This date falls on a Tuesday.
That date doesn't exist in the calendar you selected. Please check the year, month, and day.
| Calendar | Date |
|---|---|
| Gregorian | 22 September 2026 |
| Persian (Jalali/Shamsi) | ۳۱ شهریور ۱۴۰۵ |
| Hebrew | י״א תשרי תשפ״ז |
| Chinese | 2026丙午年八月十二 |
Every date, in any calendar, corresponds to exactly one point in time - so converting between calendars is really converting between two ways of numbering the same underlying sequence of days. This tool checks that the year/month/day you enter actually exists in the calendar you picked (for example, a 30th day doesn't exist in every month, and some years have an extra leap month or leap day that others don't), then works out what that same day is called in each of the other three calendars.
The Hebrew calendar numbers its months 1 through 13: months 8 through 13 (Nisan through Elul) are the same every year, but month 6 ("Adar I") only exists in a leap year, and month 7 is called "Adar" in a regular year or "Adar II" in a leap year - if you enter month 6 in a year that isn't a leap year, the tool will correctly say that date doesn't exist.
The Chinese calendar is lunisolar: most years have 12 months, but some have an extra "leap month" inserted after one specific month - tick the "leap month" box if you mean that repeated month, not the regular one. The year you enter for the Chinese calendar is given in its common, everyday form (the same Gregorian-style year number most Chinese-calendar dates are labelled with, e.g. "2026"), not its traditional 60-year cycle position.
1 January 2000 (Gregorian) - a Saturday - is 11 Dey 1378 in the Persian calendar, 23 Tevet 5760 in the Hebrew calendar, and the 25th day of the 11th month of 1999 in the Chinese calendar. Every one of those four dates refers to exactly the same day; they're just four different, equally valid ways of writing it down.
Because it genuinely doesn't, in the calendar you selected. The most common reasons: you picked a day number higher than that month actually has (month lengths vary by calendar and, in some calendars, by year); you picked Hebrew month 6 ("Adar I") in a year that isn't a Hebrew leap year; or you ticked "leap month" for a Chinese year that doesn't have one. Double-check the calendar selector matches the date you actually mean, then the month and day.
For simplicity: the Chinese calendar traditionally counts years within repeating 60-year cycles rather than counting upward indefinitely, which isn't a number most visitors would know how to enter. This tool instead uses the year number most commonly shown alongside Chinese-calendar dates in everyday use - the Gregorian year during which most of that Chinese year falls.
Each calendar is always shown using its own authentic terms and numbering - Persian dates in Persian, Hebrew dates in Hebrew, Chinese dates in Chinese - the same way a Gregorian date is written "September" everywhere rather than translated into another calendar's terms. Only the day of the week is shown in your own site language, since it's the same actual day regardless of which calendar labels it.
No - it works entirely in calendar dates (year/month/day), with no time of day or time zone involved, so there's nothing to account for. A calendar date is the same date everywhere in the world; only the moment a new day begins locally can differ, which doesn't affect a date-to-date conversion like this one.
For information only. This is not financial or tax advice.