On Sat, 14 Oct 2000, Samuel W. Heywood wrote: > >> October 1582 > >> S M Tu W Th F S > >> 1 2 3 4 15 16 > >> 17 18 19 20 21 22 23 > >> 24 25 26 27 28 29 30 > >> 31 > > >> The calendar above is ordered according to pure bull, by official edict of > >> Pope Gregory XIII. > > > When I try "cal 10 1582" on my Linux the result is > > > October 1582 > > Su Mo Tu We Th Fr Sa > > 1 2 3 4 5 6 > > 7 8 9 10 11 12 13 > > 14 15 16 17 18 19 20 > > 21 22 23 24 25 26 27 > > 28 29 30 31 > > > So if (for example) 31 Oct 1582 was Monday - is there a bug with this > > program (cal), and maybe with any other program like it ? > > > Hristo > > Hello Hristo: > > >From the point of view of all good Roman Catholics, your program is > heretical. The calendar I have posted above is correct for October 1582 > according to the decree of Pope Gregory XIII. For political reasons the > protestant countries did not adopt the Gregorian Calendar at the time. > Eventually all countries under the Christian sphere of influence came > to understand the sense of making adjustments to their calendar. The > longer they waited to apply the correction, the greater became the amount > of the correction to be applied. The English adjusted their calendar in > 1752. There are a few countries that did not adjust their calendars until > the 19th and early 20th centuries. An adjustment was needed because the > old calendar system, called the Julian Calendar, was already obsolete > after it was discovered that the Julian Calendar was based on a somewhat > inaccurate calculation for the length of the year. The error was > cumulative. By October of 1582 the error amounted to a period of 10 days. > Pope Gregory XIII decided to correct the problem simply by erasing 10 days > from October of that year and by introducing a change in the rule whereby > leap years are assigned. To erase the 10 days from October 1582 he > decreed that October 4th of that year would be followed the next day by > October 15th. When the various protestant countries came around to > adjusting their calendars, they applied appropriate corrections at the > time so as to bring their calendars into conformity with the Gregorian > Calendar. The corrections were not applied retroactively. The calendar > your program has produced is correct for protestants, but wrong for > Roman Catholics. > > Sam Heywood Yes, Sam you are right ! See result for "cal 9 1752" : September 1752 Su Mo Tu We Th Fr Sa 1 2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Thanks for your comment, I did not know it before ! But every thing is described in manual - "man cal" . RTFM Hristo, Bulgaria ---------------------------------------------------------- Visit my site for OLD computers--> http://iko.homepage.com Or contact me --> email: [EMAIL PROTECTED] or ICQ# 70729418