"Well, due to what makes a planet habitable, you won't be surprised that our planets year and day isn't incredibly different from yours..."
"But it took you millions of years to get here, why is your calendar based on a place you haven't been to in so long?"
"Well our species lifespan is about 100 years, so, actually, I was never there"
"But I guess you use that calendar to communicate back home?"
"Well, actually, the planet was swallowed by the star during its first red giant phase..."
"So your clock and calendar is based on a planet your separated from by generations, and which doesn't even exist anymore?"
"It does seem silly when you put it like that..."
"But it must be tiring writing out several digits for the year..."
"Oh, we solved that problem, we generally just write the last few digits, and it only becomes a problem every few generations"
"Cool, we just got rid of a system like that, but I'm sure it'll come back soon. Changing the subject, why do you have so many different computers?"
"Well, this is going to seem a bit silly, but we started using quantum computers a long time ago. Since there were 7 quantum states, each manufacturer had its own idea of which state should come first in memory."
Me: pats alien on back, "Dude, I feel you."