There's a gag I've seen at the start of a movie or TV show where there is text overlaid on the screen that says something like "1,000,000 BC", then a second overlay appears that indicates "Saturday". :)
I don't remember the exact date, (It was something imprecise "BC") it might have been something much smaller like 10 BC, or it might have been written out in words "one million BC", I have no idea. I also don't remember the exact day of the week that was used in the gag, could have been Wednesday or any other day of the week, but it was definitely a weekday name, I have no idea again which one. But you get the idea: the gag that a very imprecise year was used along with a very precise day-of-week reference.
I fully expect this gag may actually be used in multiple movies, but I do remember it being a fairly popular show. I can't even remember if the one I saw was Monty Python or The Simpsons, or a Jack Black movie or what but I'm certain (because it was a gag) that it had a comedic vibe. Honestly I can't even remember for certain if it happened at the start of the movie (although I'm fairly confident it was) or immediately after a time-travel moment or flash-back in the middle of an episode.
Sorry my memory is completely lacking on this one! But I'm trying to remember the film/show where I saw this gag being used.