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Comparing calendars
Hebrew vs Gregorian
The Hebrew calendar follows the moon and the sun together, while the Gregorian follows only the sun — so a Hebrew date falls on a different Gregorian day each year, held roughly in place by a leap month seven times in nineteen years.
| Attribute | Hebrew | Gregorian |
|---|---|---|
| Type | Lunisolar | Solar |
| Origin | Jewish tradition, fixed in its present form by the medieval period | A 1582 reform of the Julian calendar, under Pope Gregory XIII |
| Year | 12 or 13 lunar months (353–385 days) | 365 days, or 366 in a leap year (365.2425 on average) |
| Months | 12, or 13 in a leap year | 12, of 28–31 days |
| Week | 7 days, each beginning at sunset and ending on Shabbat | 7 days |
| Leap rule | A 13th month seven times in each 19-year (Metonic) cycle | One leap day every 4 years — but not in a century year unless it divides by 400 |
| Counts years from | A calculated date of Creation (Anno Mundi) | The traditional birth of Christ (AD / CE) |
| Where it’s used | Jewish religious life; a civil calendar in Israel | The world’s common civil calendar |
See this moment on each: Hebrew calendar · Gregorian calendar. Or convert a specific date into both.