do you send out thanksgiving cards to other people? i know you want to contact her .. when my ex and i broke i went to a million websites looking for the most obscure holidays just so i could have an excuse to contact him..i never sent a card tho.. i wanted to.. for talk like a pirate day, arbor day, forgiveness day.. ah well. Be honest with yourself.
If you want to wish her a happy thanksgiving via ecard because you truly have every selfless "nonwanting to convince her to get back with me in any way" cell in charge then go to it. If you think you may be doing it so she can see how much you care, well then maybe you should wait till christmas..its just a couple weeks anyway.
And hey while youre at it send some cards to old friends and family. Its important that everyone in your life feels appreciated and loved... this way it seems less about her and more about the season. way less weirdness and pressure on you both...
thats just my opinion btw HAPPY THANKSGIVING