@MarkHoltom hmm🤔earlier than what ? if by definition a year is between two festivals, how did they keep record ? in number of days ? or some arbitrary calendar you have to correct every couple of years ? most interesting information is missing
@slim @MarkHoltom
Japan nowadays (since 1873) uses the Gregorian calendar, so I suppose the dates are in Gregorian calendar (that's how the y-axis is labeled).
Yes, of course the monks will have used some thing else, but presumably whatever was used can be converted to Gregorian?