The calendar most of the planet uses, called either the western calendar or the Gregorian calendar, originated in 1582 when Pope Gregory 13 introduced it as an update of the Roman calendar adopted by Julius Caesar in 45
Israel likewise uses the western calendar. And its local calendar, the one which predates the western calendar by centuries: The Hebrew calendar.
That’s the calendar we find in the bible. It’s what we call a
The Hebrew calendar actually predates the Hebrews. It was used all over the ancient middle east, including by the Assyrians and Babylonians who conquered Israel. The Hebrew calendar’s months all have Assyrian names—although a few of the original Canaanite names slipped into the bible:
אָבִיב /Avív (“green”), the first month.Ex 12.2, 13.4 Tel Aviv (KJV “Telabib”) in BabylonEk 3.15 was named for it; Tel Aviv in Israel is named for that.זִֽו /Ziv (“bright”), the second month.1Ki 6.1 אֵיתָניִם /Eytaním (“strong ones”), the seventh month.1Ki 8.2 בּוּל /Bul (“produce”), the eighth month.1Ki 6.38
Otherwise the scriptures simply called the months “third month,” “fifth month,” and so forth. (Like September/seventh month, October/eighth month, and so on… and yeah they aren’t the seventh and eighth month, but blame Gregory for that.) We don’t know what the ancient Canaanite names were. No doubt many months were named for pagan gods, just like the Roman calendar, so the Hebrews didn’t care to use or record them.
In any event here are the current names.
| MONTH | DAYS | WHEN | BIBLE HOLIDAYS |
|---|---|---|---|
Nisán | 30 | Spring: Mid-March to mid-April | |
| אִיָּר Iyyár | 29 | Mid-spring: Mid-April to mid-May | |
Siván | 30 | Late spring: Mid-May to mid-June | Shavuót ( |
Tammúz | 29 | Summer: Mid-June to mid-July | |
| אָב Av | 30 | Mid-summer: Mid-July to mid-August | |
Elúl | 29 | Late summer: Mid-August to mid-September | |
| תִּשׁרִי Tišreí | 30 | Fall: Mid-September to mid-October | Yom Kippur, Sukkot |
| מַרְחֶשְׁוָן Markhéšvan | 29/30 | Mid-fall: Mid-October to mid-November | |
Khislév | 29/30 | Late fall: Mid-November to mid-December | Hanukkah |
Tevét | 29 | Winter: Mid-December to mid-January | |
Ševát | 30 | Mid-winter: Mid-January to mid-February | |
Adár | 29/30 | Late winter: Mid-February to mid-March | Purim |
