How do you get through the harder days?

It would have been my 11th anniversary, and fifth wedding anniversary with my ex-husband on Friday. I don't miss him anymore, but there's still a lot of grief and my divorce hasn't even been half a year yet.

I took the day off work and I have a slightly longer therapy session on that day. I've been getting a lot of nightmares leading up to the anniversary though, especially vivid dreams of the abuse and horrible things he'd say to me. For example I keep having moments where he "burned" my skin by pulling hard on my arm and it would hurt for several hours afterwords or him forcing sex onto me, or how he ruined so many anniversaries with how tense or scared I would be for the end of the night because of his expectations, or what would happen if I said no.

Work was hard today especially because of some of the c-ptsd but I was able to at least fight off some of the disassociating and kept myself from crying, and eventually get my mind off of things by super focusing on work.

How do you cope on anniversaries or significant dates and get through them?