When studying the Old Testament, dates can be a source of confusion, especially when they switch between the Jewish name and the Babylonian name in the same story. Here are my reference tables.

Sacred#	Civic#	Jewish	# of days	Julian	Season
1	7	Nisan	30	Mar/Apr	barley harvest
2	8	Iyyar	29	Apr/May	general harvest
3	9	Sivan	30	May/Jun	wheat harvest
4	10	Tammuz	29	Jun/Jul	almonds ripe
5	11	Ab	30	Jul/Aug	grape, fig, olive
6	12	Elul	29	Aug/Sep	grape, fig, olive
7	1	Tishri	30	Sep/Oct	early rain, plowing
8	2	Marhesvan	29/30	Oct/Nov	wheat barley sowing
9	3	Kislev	30/29	Nov/Dec	rainy months
10	4	Tebeth	29	Dec/Jan	rainy months
11	5	Shebat	30	Jan/Feb	rainy months
12	6	Adar	29/30	Feb/Mar	almonds blooming
.	.	.	Total: 354/355	.	.

Sacred#	Jewish Name	Babylonian Name	Macedonian Name
1	Nisan	Nisanu	Artemisios
2	Iyyar	Aiaru	Daisios
3	Sivan	Simanu	Panemos
4	Tammuz	Duzu	Loos
5	Ab	Abu	Gorpiaios
6	Elul	Ululu	Hyperbereatios
7	Tishri	Tashritu	Dios
8	Marhesvan	Arahsamnu	Appellaios
9	Kislev	Kislimu	Audynaios
10	Tebeth	Tebetu	Peritios
11	Shebat	Shabatu	Dystros
12	Adar	Addaru	Xanthikos

Further Reference:

• Hebrew4 Christians: Jewish Holidays
• Bible-History.com: Jewish Calendar
• Barnes Bible Charts: Hebrew Calendar
• Wikipedia: Hebrew Calendar
• Jewish Calendar Sacred and Civil Years
• Hebrew Calendar Converter
• Time&Date: Jewish Calendar

Jewish Feasts

For more information see: Hebrew4Christians

1. Passover (Pesach) – Nisan
2. Unleavened Bread (Chag Hamotzi) – Nisan
3. First Fruits (Yom habikkurim) – Nisan
4. Pentecost (Shavu’ot) – Sivan
5. Trumpets (Yom Teru’ah) – Tishri
6. Atonement (Yom Kippur) – Tishri
7. Tabernacles (Sukkot) – Tishri

Introduction to Jewish Feasts

Photo from Bible-History.com and used here under Flickr Creative Commons.