This is from the WhenIs.com website
When is Eid al-Fitr in 2009?
Eid al-Fitr in 2009 is on Sunday, the 20th of September.
Note that in the Muslim calander, a holiday begins on the sunset of the previous day, so observing Muslims will celebrate Eid al-Fitr on the sunset of Saturday, the 19th of September.
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The dates provided here are based on the dates adopted by the Fiqh Council of North America for the celebration of Eid al-Fitr. Note that these dates are based on astronomical calculations to affirm each date, and not on the actual sighting of the moon with the naked eyes. This approach is accepted by many, but is still being hotly debated.