Hebrew to Gregorian Converter

Hebrew ↔ Gregorian conversion

The Hebrew calendar is a lunisolar calendar — months follow the moon, but an extra leap month is inserted 7 times in every 19-year cycle to keep festivals aligned with the seasons. This makes exact conversion mathematically complex, but our calculator handles it correctly for any date.

Leap years and Adar

In a Hebrew leap year, the month of Adar becomes two months — Adar I and Adar II. Adar I is the leap month (30 days); Adar II is the "real" Adar where festivals like Purim are observed. The converter above knows which years are leap years and handles the month naming automatically.

Days begin at sundown

A Hebrew day begins at sundown, not midnight. This is why Jewish holidays are often described as beginning "the evening of" a given Gregorian date. For date conversion, this page uses the convention that a Gregorian day maps to the Hebrew date that runs from the previous sundown to that day's sundown — the standard mapping used in most calendar software.

Common Hebrew dates in 5786

Hebrew calendar quirks worth knowing

The Hebrew calendar has several subtleties that can catch Gregorian-trained users off guard:

• Days begin at sundown. Hebrew Monday actually starts on Gregorian Sunday evening. This means Jewish holidays span two Gregorian dates.
• Leap year adds a month, not a day. Unlike Gregorian leap years (which add 29 February), Hebrew leap years add a whole extra month: Adar I, before the regular Adar (now called Adar II).
• The year number increments in Tishrei, not Nisan. Even though Nisan is called the "first month" in religious tradition, the civil year increments on 1 Tishrei (Rosh Hashanah) six months later.
• Purim moves to Adar II in leap years. So in some years Purim is in February (Gregorian), in others it's in March.

Finding a Hebrew birthday in the Gregorian calendar

Your Hebrew birthday slips around the Gregorian year — up to a month in either direction. To find when your Hebrew birthday falls in a specific Gregorian year:

1. Enter your Hebrew birth date (day, month, year) in the converter above.
2. Select "Hebrew → Gregorian."
3. Iterate through target Hebrew years (5786, 5787, 5788…) to see when your Hebrew birthday falls in each.

Special case: if you were born in Adar of a non-leap year, your birthday in a leap year can be observed either on Adar I (symbolic date) or Adar II (same month name) — traditions vary. Consult your community.

Major Hebrew holidays and their Gregorian dates through 5790

5786 is a leap year

The current Hebrew year (5786 AM) is a leap year — the 19-year cycle's 19th year, always a leap year. It contains 13 months including Adar I (inserted before the normal Adar, which is renamed Adar II). The next Hebrew leap year is 5789.