But the program thw author is promoting says it does support dates before 1900.
I would worry what it does for dates between 1582 and 1753 in Anglo countries.
Basically you need to quote the date system as well as the date to get it correct. Even today there are countries not using Gregorian calendar.
I record dates as Julian days (or modified to not need a 32bit number) which is what Excel stores just using a different base date.
But the program thw author is promoting says it does support dates before 1900.
I would worry what it does for dates between 1582 and 1753 in Anglo countries.
Basically you need to quote the date system as well as the date to get it correct. Even today there are countries not using Gregorian calendar.
I record dates as Julian days (or modified to not need a 32bit number) which is what Excel stores just using a different base date.