Winter Breaks in Nice

The weather in Nice is mild during winter and the days are often sunny. There's plenty of special events and things to do too.
For example:

Nice Christmas Market

November 26 to January 4, 2012. Ice skating, special illuminations and an outdoor market.

Nice Carnival

February 17 to March 4, 2012. An event not to be missed with Carnival floats surrounded by dancers and street artists from around the world who will delight and surprise you.
Nice Carnival Official Website

Prom'Classic 10 km race

Along the Promenade des Anglais January 9, 2011
Prom Classic Official Website

Nice Gourd Festival

March 2011
Official Nice Gourd Festival Website

Outside Nice

Menton Citron Festival

February 18 to March 9, 2011
Official Menton Citron Festival Website

Moutains

Alternatively, why not spend the day in the mountains? The ski slopes are just 2 hours away by bus (€1 each way).
Slope Information on Isola2000.com
Slope Information on Auron.com