No new equipment in races…er, charity events…
I wouldn’t change them, sounds like they’re still good. If you’ve noticed more and more small punctures or cuts, yes, change them, but you should’ve done so last week.
Especially with tubeless tyres, I find they sometimes need a few days/rides to fully seal, so I wouldn’t put new ones on directly before a long event.
And, talking about serious tyre cuts - that’s just as likely on new tyres.