That's the holiday right after Christmas where we take all the stuff we got for Christmas and divide it into two piles - stuff we like and want to keep; and stuff we don't like and want to exchange for something else.
Which is fine, except we tend to do that to Jesus - divide him up into stuff we want to keep and stuff we don't like about him and want to get an exchange or a refund. (the bits about love and forgiveness I'll keep, but give me something else for the "take up your cross" and "love your enemies" bits)...
I don't make new year's resolutions, but if I did, my first resolution would be "Don't be a boxing day Christian".
Take all of Him.