It really annoys the hell out of me that we don't use a better calendar. I think about this once a week at least. I feel like being stuck with the Gregorian calendar is a good example of why so many inefficient structures exist in society - some assholes centuries ago decided on a thing, and out of habit and laziness we've stuck with it since.
Set the current time to exactly 13.77 billion years (in seconds) then add the current Unix time in seconds from January 1, 1970 to maintain continuity. Just conveniently forget about the 40 million year uncertainty, it will cloud your mind.
This way we have an absolute clock that is closer to reality than from some religiously based calendar.