The Feasts of YHWH
Sabbath - celebrated on the seventh day. The Biblical day begins at sunset, therefore all Feasts begin at sunset. Sabbath begins Friday evening at sunset, and ends Saturday at sunset.
Spring
Passover (Pesach) For information on Passover and the Feast of Unleavened Bread please visit our Spring 2006 and Updates for Passover 2007 issues on the Magazine page.
Unleavened Bread (Hag HaMatzah)
First Fruits (Yom HaBikkurim )
Weeks (Shavuot) For information about counting the omer and the feast of Shavuot please see the Spring 2007 and Summer 2007 issue.
Fall
Article: Celebrating the Fall Feasts by Margaret McKee Huey of Outreach Israel
Feast of Trumpets (Yom Teruah also known as Rosh HaShanah) click to read the study and worship guide written by Elder Mark Ensign of Adot Adonai.
Day of Atonement (Yom Kippur) click to read an excerpt on the Day of Atonement from the book The Seven Festivals of Messiah by Eddie Chumney of Hebraic Heritage Ministries International New to fasting or have a difficult time fasting? I found some excellent advice for fasting onYom Kippur at Judaism 101
Feast of Tabernacles (Sukkot) / The Last Great day (Shemini Atzeret) Click to read article on the celebration of Sukkot by Bonnie Wills
Other Feasts Days:
Chanukah
A Brief Note on Dates
Some Messianic believers follow the traditional calendar dates for the Feasts. Others follow the Karaite method of determining the Feasts day by the first new moon after the barley has reached it’s ripeness in Israel (Aviv). This site will post both dates. No matter which calendar all Feast days begin at sunset on the day before the date listed and continue for 24 hours until sunset on the following day. For example if you are celebrating Feast of Trumpets on 9/23 then the Feast begins at sunset on 9/22 and ends sunset 9/23. This means that labor is forbidden from sunset to sunset. To determine when the sun sets in your area I would suggest www.chabad.org
Feast Dates 2008
Karaite
Passover begins at sunset on April 21, 2008
Last day of Unleavened Bread April 28, 2008
First Fruits: April 27, 2008*
Shavuot: June 15, 2008*
Yom Teruah: October 2, 2008**
Yom Kippur: October 11, 2008**
Sukkot begins: Octopber 16, 2008**
Shemini Atzeret (the Eight Day): October 23, 2008**
Days of Purim: March 12-13, 2009
Rabbinical
Passover: April 20, 2008
Shavuot: June 9, 2008
Yom Teruah: September 30, 2008
Yom Kippur: October 9, 2008
Sukkot begins: October 14, 2008
Shemini Atzeret (the Eighth Day): October 21, 2008
Chanukah: December 22, 2008
Purim: March 10, 2009
*This date is based on my belief that First Fruits occurs on the day after the weekly Sabbath following Passover, however I understand that there are those who believe differently. I do not judge those who different keep dates, but I have listed them here simply as a courtesy. If you do not hold to this particular view, please feel free to adjust the date accordingly. 
**Pending sighting