Bags on sale after Xmas? Or in Feb?

  1. I'll be in Las Vegas for Xmas & after.
    Does any of the stores, Gucci, Burberry, Dior, etc, go on sale?
    Or is current sale like on Gucci the best/only there is?

    I'm also in HK & Japan for Feb.
    Or would it be better during chinese new year in those countries?