I recently downloaded a programme called XDate which does calculations on
dates before 1900. In particular the function xdatedif calculates the number
of days between two dates. I have been having problems with it giving
erratic results. For instance it gives the number of days between 4 Nov 1886
and 21 Nov 1888 as 955 when in fact it is 746, it gives the difference
between 4 and 25 Feb 1882 as -36, which is obviously incorrect.
Has anyone on the list used this program and had a similar experience?