I think it's one of those 'the days are long but the years are short' things that you start experiencing as you age. Like, I'm pretty sure Spouse and I just moved onto the ranch about a week from being married, but apparently not only were those two events like five years apart, it's been five more years since they happened!
Someone at work asked how long I'd been here and I realized it's been like 10 years, even though every week I go 'god, next week I need to apply to some other places because this place sucks' (and then I don't, because I'm tired from working the whole week)
Add in the kind of pandemic-time-compression effect of not actually having to be anywhere on a real schedule (wait it's march? wasn't it just march a week ago?) and you get the kind of subjective time dilation that immortals get.