http://www.torah.org/learning/yomtov/calendar/5766.html

Year 5766 / 2005-2006
Yom Tov/Holiday	Hebrew Date	English Date
Rosh Hashana (2 days) Melacha* is prohibited	Tishrei 1-2, 5766	October 4-5, 2005
Fast of Gedalia Melacha* is permitted	Tishrei 3, 5766	October 6, 2005
Yom Kippur Melacha* is prohibited	Tishrei 10, 5766	October 13, 2005
Succos (6 days) Melacha* is prohibited on the first 2 days	Tishrei 15-20, 5766	October 18-23, 2005
Hoshana Rabba Melacha* is permitted	Tishrei 21, 5766	October 24, 2005
Shemini Atzeres Melacha* is prohibited	Tishrei 22, 5766	October 25, 2005
Simchas Torah Melacha* is prohibited	Tishrei 23, 5766	October 26, 2005
Chanuka (8 days) Melacha* is permitted	Kislev 25 - Teves 3, 5766	December 26-January 2, 2005
Fast of 10th of Teves Melacha* is permitted	Teves 10, 5766	January 10, 2006
Tu B'Shvat Melacha* is permitted	Shvat 15, 5766	February 13, 2006
Fast of Esther Melacha* is permitted	Adar 13, 5766	March 13, 2006
Purim Melacha* is permitted	Adar 14, 5766	March 14, 2006
Passover (8 days) Melacha* is prohibited on first and last 2 days	Nissan 15-22, 5766	April 13-20, 2006
Holocaust Day Melacha* is permitted	Nissan 27, 5766	April 25, 2006
Israel Independence Day Melacha* is permitted	Iyar 5, 5766	May 3, 2006
Lag B'Omer Melacha* is permitted	Iyar 18, 5766	May 16, 2006
Yom Yerushalayim Melacha* is permitted	Iyar 28, 5766	May 26, 2006
Shavuos (2 days) Melacha* is prohibited	Sivan 6-7, 5766	June 2-3, 2006
Fast of 17th of Tamuz Melacha* is permitted	Tamuz 17, 5766	July 13, 2006
Fast of Tisha B'Av Melacha* is permitted	Av 9, 5766	August 3, 2006

* Melacha - (lit: constructive work) activities prohibited by Torah Law on the Sabbath and Holidays.