The evening of 5th of January is the Twelfth Night.
If you celebrated Christmas, it's time to stop. It's the official end of the 12 Days of Christmas and it's time to take down the decorations. If the decorations were edible, you are supposed to eat them. Yes, really.
If your traditions precede Christianity, that party (aka Winter Festival) that started on Halloween is over...go home.
If you are The Lord of Misrule, your rule is coming to an end. And please drain the wassail bowl before you leave.
There are traditions that are better left in history. And just in case you thought the Christmas season was long over -- nope, but it will be tomorrow.