Chinese New Year (including the Lantern Festival on day 15), Mid-Autumn Festival and the Dragon Boat Festival are the most important and widely celebrated Chinese holidays. However there are quite a few other holidays celebrated by their lunar dates.
The 25th year of this cycle began:
February 7, 2008 - Chinese New Year - lunar 1/1, Year of the Rat, 4706
Remaining big dates in 2008:
Winter Solstice "Dong Zhi" Falls on December 20-22. Probably December 21st in 2008.