Hebrew ↔ Gregorian Date Converter
Convert civil dates to Hebrew calendar dates and back, with leap-month validation and an optional after-sunset adjustment.
Gregorian to Hebrew
Hebrew to Gregorian
Local conversion with sunset made explicit
The calculator uses the browser’s Hebrew calendar implementation rather than sending dates to a third-party service. Month and day controls are rebuilt for the selected Hebrew year, including Adar I and Adar II in leap years.
A Hebrew date conventionally begins at sunset. Because sunset depends on location and season, the forward converter asks you to state whether the civil date is already after local sunset; it does not guess from your location.
Method reviewed 11 July 2026: MDN Intl.DateTimeFormat; independently cross-checked against Hebcal’s date converter.
Hebrew Date Converter FAQ
Does a Hebrew date begin at midnight?
Traditionally, the Hebrew calendar day begins at sunset. The Gregorian-to-Hebrew form therefore includes an optional after-sunset adjustment, and the reverse result identifies the preceding civil evening.
Does the converter use an online API?
No. It uses the browser’s built-in Internationalization API with the Hebrew calendar and performs conversion locally.
Why is the supported range limited?
ToolBullet limits Gregorian years to 1900–2100 and Hebrew years to 5660–5860 so validation and reverse lookup remain predictable across supported browsers.
How are Hebrew leap months handled?
The month list is generated from the selected year. Leap years expose Adar I and Adar II; non-leap years expose a single Adar.
Should I use this for a legal or religious deadline?
Use it as a planning and cross-checking aid. Confirm important observances, lifecycle events and legal dates with an official calendar or relevant community authority.
