A quick remix of shirley77's Puzzle Ornament to add some future-proofing. Includes years from now (2019) to 2027 (my sincerest apologies to all those viewing this during or after 2028), plus back to 2012 in case you have a use for past years. I also included a blank one so you can be more ambiguous, if you're into that kind of thing. I don't judge. I also converted it to millimeters, since in my experience most slicers use them.
If you happen to want a year (or other short text) that I didn't include, just let me know by either commenting or messaging me. You could also add it yourself to the blank one; I used Impact font, size 9.5pt, and extruded it 1.2mm (in either direction). Happy Printing (or lasering, or FTL travelling, or whatever you're using this for)!
Update 12/28/2017: TinkerWest mentioned that engraved text would also be a nice thing to have, so I've added engraved versions, yay! I also noticed that the file tab was getting a bit cluttered, so I added some .zip folders to help you download convenient selections more quickly. Whoever first said slow and steady wins the race clearly never had to download a lot of files individually. No, seriously, he didn't. He died over 2500 years before the internet or the first file transfer.