Wol wrote >INT (DAY / 365.25) > >will always give the correct number of years since day 0.
The following shows that is not strictly true because of the centennial non-leap year. Test Program 001: ZZ = 0 002: FOR XX = 1 TO 50000 003: Y1 = 1968 + INT((XX-1)/365.25) 004: Y2 = OCONV(XX,'DY') 005: IF Y1 NE Y2 THEN 006: ZZ += 1 007: CRT ZZ,XX,OCONV(XX,'D') 008: END 009: NEXT XX Results 1 48579 01 JAN 2101 2 48944 01 JAN 2102 3 49309 01 JAN 2103 4 49674 01 JAN 2104 I vaguely remember a comment a long time ago (maybe in c.d.p?) that the date was chosen _because_ it was a leap year that started on a Sunday and that this helped in converting dates from other IBM formats for the GIRLS/GIM project. Regards, Keith ------- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
