Based on what I'd read, and the assertions of groups like ISNA, I've been saying for years that if you don't sight the moon, it just doesn't count. Apparently that's not the case any more:

The Fiqh Council of North America after careful research, deliberations and discussion has adopted a new position regarding the determination of the beginning of the Islamic lunar months

[ Read News: ISNA.net ]

In reality I've just followed the guidance of ISNA, and I guess if they've taken a new stance, then I'm all for it. This certainly helps for scheduling things. Maybe some day I'll be less busy and can investigate the jurisprudence behind this.

So, based on the new ruling, and fancy schmancy mathematical calculations:

According to the calculation criteria for determining the Islamic Lunar dates adopted by the Fiqh Council of North America, following are the dates for Ramadan and Eidul Fitr for the year 1427.

Ramadan 1427 - First of Fasting September 23, 2006
Eidul Fitr 1427 - First of Shawwal October 23, 2006