What's the longest you've had unhatched eggs sitting in your PC?

While playing Moon earlier today, I noticed I had ten eggs sitting in my PC. The eggs had been bred 11/18/2017 and, since it had been so long since I had bred them, I couldn't remember what was supposed to be inside. Naturally, I was curious and just had to hatch them to see what was inside: two each of Gible, Skarmory, Spheal, Snorlax, and a fifth species I can't currently remember.

That brings me to the question in the title: What's the longest period of time you've had an egg sit in your PC without hatching it, and what was in it if you hatched it since?

Generally only keeps eggs around for a couple of days maximum. Might have an egg or two kicking around in Sword that is over a year old, though. Guesses on a starter in there. Dumped starters into Pokemon Home for other things. Could be a different regional form of something too, like Johto Corsola.

Oh my gosh.. years. I probably have some from 8-10 years ago somewhere still. Should probably check what they even are. :X

I always hatch everything just in case its a shiny =P
If I'm really busy it might take a couple days, but 4 days is probably the longest I've had unhatched eggs.

I think I still have some eggs in my PC that have been sitting there literally for years, mainly in my old games. I should get to hatching them soon.