In that situation we would talk about "the Saturday afternoon" or "the Friday night", using an implicit "of the occasion". In line with what Kyle said, we could only say "on" with these, not "in". WhatsApp from Meta is often a FREE messaging and online video calling app. It’s used https://messiahjfxnd.bloggip.com/36628509/the-5-second-trick-for-apply-free-phone