We have the word "eve" to mean the day before a specific day, like a holiday. The day before Christmas is "Christmas Eve".
Is there a word that can be used to concisely say "the day after Christmas", such as "I disposed of my Christmas tree on Christmas XXXX"?
Edit: To clarify, I'm not concerned with Christmas specifically, but with a way to say "the day after a specific, named day". Therefore, "the second day of Christmas", while interesting, is not a valid answer to this question, unless you can also say "the second day of Presidents' Day", which -- although "Presidents' Day Eve" doesn't sound a lot better, either -- does not seem correct.