In that case we'd look at "the Saturday afternoon" or "the Friday evening", having an implicit "in the celebration". In keeping with what Kyle said, we could only say "on" Using these, not "in". As for the last example, "rid of the awful cold," I find "rid" to work better https://buy-pneumatic-diaphragm-p64310.buyoutblog.com/36462902/the-smart-trick-of-free-government-iphone-that-no-one-is-discussing