NetNews Usenet Archive 1993 #1/NN_1993_1.iso/spool/comp/lang/c/19401

Text File | 1993-01-08 | 1.9 KB | 51 lines

Newsgroups: comp.lang.c
Path: sparky!uunet!spillman!tye
From: [e-mail] (E. Tye McQueen)
Subject: Re: Recurring date/times?
Message-ID: <[e-mail]>
Date: Fri, 08 Jan 1993 04:45:26 GMT
References: <[e-mail]> <[e-mail]>
Organization: Spillman Data Systems
Lines: 40

[e-mail] (Wayne Geiser) writes:

)In article <[e-mail]>, [e-mail] (Robert Mah) writes:
)|> Anyone have any suggestions on good data structures for representing
)|> recurring dates and times.  That is, things like "the first teusday
)|> of every month" or "three days before the end of every month", etc.
)
)m  Monthly event (Gregorian number)
)m/d    Gregorian event with no associated year
)m/d/y  Gregorian event
)Hm/d    Jewish event (i.e., Hebrew calendar)
)HFm/d   Jewish fast day (special rules apply)
)Im/d    Islamic event
)Jm/d    Julian event
)*       Every day
)M(m/d)  Monday on or before date (T, W, R, F, S, U are the other days of the
)        week)
)E       Easter
)m/d+days Add number of days to the date
)m/d-days Subtract number of days from date
)
)There are lots of permutations:
)
)E+60    Gives you Corpus Christi (Thursday following Trinity Sunday)
)H1/1-16 Gives Purim (needs odd calculation because of leap months in the
)        Hebrew calendar
)W(*)    Every Wednesday
)M(1/31) Australia Day Observed (Monday on or after 1/26).
)*+1     Tomorrow

Are you missing one for "the day you get off for Christmas"?
Ie. 12/25 unless on a weekend when you add or subtract one.

Very similar is "the day you get off for Independence day":
07/04 unless on a weekend when you go to the next Monday.

 [e-mail]                         Tye McQueen, E.
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