I heard people buy themselves a present. Coffee mug or something you love.
Grill a steak, have an ice cream cupcake, go do something you enjoy, have friends over (sober friends), many other options. Anything special that doesn’t involve alcohol.
Bbq
Lol, I celebrate without alcohol by not drinking it, while celebrating. 




The celebration is the next day when I wake up and I'm not hungover with regret
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There is a ginger beer called c0ck and bull… it is a spicy one! Or Bundaberg. Two of my favorites.
I dance pretty much all the time, just MORE of that when I’m celebrating. 
Anybody up to meet up
Years ago .they celebrate with a cake at a meeting.every one celebrating for that month.
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I went to a casino for my 25 anniversary.