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Top Forums Shell Programming and Scripting Run cron on every second Saturday ?? Post 302674297 by jim mcnamara on Thursday 19th of July 2012 10:29:14 AM
Old 07-19-2012
There are a ton of books on this subject - keeping code and business rules separated.
I work on a huge CIS which does not do that. I get a lot less sleep as a result.
So this kind of thing is a hot button for me. Dates are the very worst part of this deal, IMO.

While scott's approach is correct, a priori, the next guy may not know what the heck those gyrations are for. 90% of coding is done by the 'next guy'.

What happens when the OP finds out he has to skip the Saturday after some holiday?
Lots of holidays work on a lunar calendar, BTW. And many holidays are based on a separate non-Gregorian calendar, e.g. Hijri, Hebrew, etc. In Israel the Knesset decides when daylight savings time starts, and they sometimes do it a posteriori. Good Luck.

Just my point of view.
 

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holidays(4)							   File Formats 						       holidays(4)

NAME
holidays - prime/nonprime table for the accounting system SYNOPSIS
/etc/acct/holidays DESCRIPTION
The /etc/acct/holidays file describes which hours are considered prime time and which days are holidays. Holidays and weekends are con- sidered non-prime time hours. /etc/acct/holidays is used by the accounting system. All lines beginning with an "*" are comments. The /etc/acct/holidays file consists of two sections. The first non-comment line defines the current year and the start time of prime and non-prime time hours, in the form: current_year prime_start non_prime_start The remaining non-comment lines define the holidays in the form: month/day company_holiday Of these two fields, only the month/day is actually used by the accounting system programs. The /etc/acct/holidays file must be updated each year. EXAMPLES
Example 1: Example of the /etc/acct/holidays file. The following is an example of the /etc/acct/holidays file: * Prime/Nonprime Table for the accounting system * * Curr Prime Non-Prime * Year Start Start * 1991 0830 1800 * * only the first column (month/day) is significant. * * month/day Company Holiday * 1/1 New Years Day 5/30 Memorial Day 7/4 Indep. Day 9/5 Labor Day 11/24 Thanksgiving Day 11/25 day after Thanksgiving 12/25 Christmas 12/26 day after Christmas SEE ALSO
acct(1M) SunOS 5.10 28 Mar 1991 holidays(4)
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