I agree with Bonsoir - why celebrate something so primitive. You may as well throw a party when her wisdom teeth come through, or her first bout of thrush.
I think periods should just be accepted as something normal, talk about your own periods with your daughter and say 'this will start with you when you are 12 or so' and be no nonsense about it.
DD started her period just before her 12th birthday, she called me when I was in Tesco, talked for 5 minutes about nonsense, and then she said 'oh by the way, mum, I have started my period, I don't like the feel of the pads which were in the cupboard, please get me different ones'.
No nonsense. No need for any fuss, either positive or negative, imo.
OP - why are you telling us to draw a line under it? It is an open thread, you don't own the discussion.