I like the way the humor of this joke travels along a spectrum from relatability to absurdity as time cycles. Using the weekly one as an example, I think it achieves peak relatability on a wednesday, because that's the best intersection of being deep enough into the week to feel like its been a long one but also not so far into the week that you're seeing the light at the end of the tunnel and feeling hopeful. Peak absurdity for most people would likely be the weekend. I'll not be hearing arguments for Thursday, as I could never get the hang of Thursday.