Note on dates: Western dates until 4 October 1582 CE (18 Tishri 5343 AM) are reckoned according to the Julian calendar. Dates from 15 October 1582 CE (19 Tishri 5343 AM) are reckoned according to the Gregorian calendar.
| Note that this calendar calculator is based on the current rules of the Hebrew calendar which, according to tradition, were first introduced in the fourth century CE but were not generally followed until after the tenth century CE. |
The year can be changed to any other year by clicking on the ±1, ±10, ±100 and ±1000-year buttons until the desired year is displayed.
In addition, there are buttons for adjusting the year in 19-year intervals (Metonic cycle) and 28-year (solar cycle) intervals.
Buttons for larger intervals of 247 years, traditionally attributed to the 9th-century gaon Nahshon bar Zadok, and 4104 years are also provided. These intervals are near-repetition periods of the Hebrew calendar after which the principal festivals (nearly) always fall on the same weekday. Note that after each of these cycles, the New Year molads progressively decrease by 905 parts (about 50 minutes) or 1080 parts (exactly 1 hour).
The year in the sabbatical cycle is given according to the reconstruction of this seven-year cycle from post-exilic sources proposed in 1857 by Benedict Zuckermann. Other reconstructions, notably that proposed by Beth Zion Wacholder (1973, 1975, 1983), suggest that the sabbatical year should be one year later. When seven sabbatical cycles were completed, a so-called jubilee was announced. Here it is assumed to correspond with the first year of a new 49-year cycle.