I chatted with Steffen (the brain behind timeanddate.com) many years ago - back when irc chatting was hot and my Amiga computer still had electrons flowing. We are both Norwegians, and he pointed me to the year 1700 where they suddenly switched calenders in the middle of february here in Norway. Steffen does gets the details in, and I still dont understand why that site still has so few ads.
Since you are in the Norwegian pace now, here is the Norwegian calender for year 1700:
Greetings, I was going to suggest to used the start of your time lapse as the start of Julian Calendar, then you would NOT have to reflect about your longevity. ;-)
I visited that site and was pleasantly amused by the note that my request for start date as 01/01/0001 was way too early in time, and wanted to confirm my selection LoL.
Stardate of 734 545 has a ring of a more absolute reference. ;-)
BTW, thanks for sharing, those are pretty interesting sites, but I am happier in warmer weather ... keep warm