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| Tu B’Shvat 1766 |  | FRI
24 January 1766 14 Shevat 5526 | SHABBAT
25 January 1766 15 Shevat 5526 | | | |
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| Ta’anit Esther (moved) 1766 |  | | THU
20 February 1766 11 Adar 5526 | | | zomRow |
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| Purim 1766 |  | SHABBAT
22 February 1766 13 Adar 5526 | SUN
23 February 1766 14 Adar 5526 | | | |
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| Shushan Purim 1766 |  | SUN
23 February 1766 14 Adar 5526 | MON
24 February 1766 15 Adar 5526 | | | |
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| Pesach 1766 |  | MON
24 March 1766 14 Nissan 5526 | MON
31 March 1766 21 Nissan 5526 | | | |
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| Lag BaOmer 1766 |  | SHABBAT
26 April 1766 17 Iyar 5526 | SUN
27 April 1766 18 Iyar 5526 | | | |
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| Shavuot 1766 |  | TUE
13 May 1766 5 Sivan 5526 | WED
14 May 1766 6 Sivan 5526 | | | |
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| Tzom Shiva Asar B'Tammuz 1766 |  | | TUE
24 June 1766 17 Tamuz 5526 | | | zomRow |
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| Tzom Tisha B'av 1766 |  | MON
14 July 1766 8 Av 5526 | TUE
15 July 1766 9 Av 5526 | | | zomRow |
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| Rosh Hashanah 1766 |  | WED
3 September 1766 29 Elul 5526 | FRI
5 September 1766 2 Tishrei 5527 | | | |
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| Tzom Gedaliah (moved) 1766 |  | | SUN
7 September 1766 4 Tishrei 5527 | | | zomRow |
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| Yom Kippur 1766 |  | FRI
12 September 1766 9 Tishrei 5527 | SHABBAT
13 September 1766 10 Tishrei 5527 | | | |
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| Sukkot 1766 |  | WED
17 September 1766 14 Tishrei 5527 | WED
24 September 1766 21 Tishrei 5527 | | | |
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| Simchat Torah 1766 |  | WED
24 September 1766 21 Tishrei 5527 | THU
25 September 1766 22 Tishrei 5527 | | | |
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| Hanukkah 1766 |  | WED
26 November 1766 24 Kislev 5527 | THU
4 December 1766 2 Tevet 5527 | | | |
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| Tzom Asara B'Tevet 1766 |  | | FRI
12 December 1766 10 Tevet 5527 | | | |
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