My Apartment Manager is not a Wiki Thread, #3

[Labster]

We had solved that by putting their driver's license date into the wiki -- whatever it says on their ID card to be close enough to their real age.  Unless they arrive the same day of the year they left their home universe, it's never going to be exact if they want to keep their birthday.

Of course, whether the birthday is based on the Earth calendar is another problem.  The solution proposed by the Aria manga is actually unworkable unless Mars is in a different orbit in their universe, but it is reasonably close to a realistic number.  Sometimes you can give too much detail when writing.

We also have characters whose birthdays are on the Julian calendar, and they'll have to choose whether to convert the date or not, just as people did when their country adopted the Gregorian calendar.