I don't know, but I sure will be relieved. I still think acknowledging her b-day is counter to letting her go. But if an email warms her then that would be good as well. Which path should I take.....I am still at a loss.
My sitch is different in that I have no contact at all with my W. Last Thursday was a shock when she emailed me and I still think it was because I went dark and let her go.
So it's been a week. Time is what you've got plenty of.
I lived with my W with 4 months of not talking. She only came home to sleep after drinking herself to a incoherent blob.
I let her be.
I know it's a little different but you actually have bit of an advantage. She's gone and without you. Mine now is making my detachment finale pretty hard being all nice and cute.