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

[Elder Trainer]

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?

 

[Devalue]

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.

 

[Sheep]

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

 

[ReKoil]

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.

 

[Sweet Serenity]

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.