Orthodox Union

Rosh HaShanah
1-2 Tishrei

Yom HaShoah
27 Nisan

Tzom Gedaliah
3 Tishrei

Rosh Chodesh Iyar

Yom Kippur
10 Tishrei

Chodesh Iyar

Sukkot
15-20 Tishrei

Yom Hazikaron
4 Iyar

Hosha'anah Rabah
21 Tishrei

Yom HaAtzmaut
5 Iyar

Shmini Atzeret
22 Tishrei

Lag BaOmer
18 Iyar

Simchat Torah
23 Tishrei (In Israel: 22 Tishrei)

Yom Yerushalayim
28 Iyar

Chanukah
25 Kislev - 3 Tevet

Rosh Chodesh Sivan

Rosh Chodesh Tevet

The Month of Sivan

Asarah B'Tevet
10 Tevet

Shavuot
6-7 Sivan (In Israel: 6 Sivan)

Tu B'Shevat
15 Shevat

The Month of Tammuz

Fast of Esther
13 Adar

Fast of Shiva Asar B'Tammuz
17 Tammuz

Purim
14 Adar

The Three Weeks
17 Tammuz - 9 Avnt>

Shushan Purim
15 Adar

The Month of Av

Rosh Chodesh Nisan

Fast of Tisha B'Av
9 Av

Chodesh Nisan, The Month of Nisan

Tu B'Av
15 Av

Passover
15-22 Nisan (Israel: 15-21 Nisan)

Rosh Chodesh Elul

From Ruin to Renewal

Elul

Sefirat HaOmer
16 Nisan - 5 Sivan