Wouldn't it be easier to have a sobriety date, and celebrate that? You could of course have an alcohol-free date as well as different pot, meth, x, and coke clean dates, but that would mean eating a lot of cakes. Then you could have an OA date too.
If you head south you and go on a toot you could then have a bunch of US dates to celebrate as well as all your normal Canadian dates.
One guy I heard about talked about having 89 days but got wasted for 4 days that week, so in his mind he now has 85 days.
Or, maybe this whole thing is not about days or dates at all, but about something else yet to be discovered in your journey?