Through February 19 Skate on the Eiffel Tower! This year the ice skating rink on the first level of the Eiffel Tower is back, free for those who already have a ticket for the Tower, open daily 10:30am-10:30pm. Skip the line by taking the stairs, it will help you warm up, too! Skates size 25-47 (EU), sleds and scooters for kids, gloves are required. This year's theme is Ice Hockey, though it will be less brutal than the NHL!
January 11 - February 21 The annual winter sales, aka Les Soldes. Honestly, the rules about when and how sales can take place in France since the economic crise have essentially made the sales irrelevant. There are sales all of the time now (often called "promotion" or "7 Jours BHV" or something like that).