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Full Discussion: Conditional Cron
Top Forums Shell Programming and Scripting Conditional Cron Post 302112796 by awk on Friday 30th of March 2007 10:36:54 AM
Old 03-30-2007
running this in ksh seems to work -

[ $(TZ=GMT-48 date +%d) -eq "01" ] && echo true

Of course, you will need to make adjustments if you are far from England.

Basically, sets the date 48 hours ahead and does the date. Today, the 30th, comes up with 01, since march has 30 days.

The cal routine would not work on months where the last day of the month was on Sunday, since that would be the first field, and $NF-1 would be the entire line (the last day), and not the day before.
 

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CAL_FROM_JD(3)								 1							    CAL_FROM_JD(3)

cal_from_jd - Converts from Julian Day Count to a supported calendar

SYNOPSIS
array cal_from_jd (int $jd, int $calendar) DESCRIPTION
cal_from_jd(3) converts the Julian day given in $jd into a date of the specified $calendar. Supported $calendar values are CAL_GREGORIAN, CAL_JULIAN, CAL_JEWISH and CAL_FRENCH. PARAMETERS
o $jd - Julian day as integer o $calendar - Calendar to convert to RETURN VALUES
Returns an array containing calendar information like month, day, year, day of week, abbreviated and full names of weekday and month and the date in string form "month/day/year". EXAMPLES
Example #1 cal_from_jd(3) example <?php $today = unixtojd(mktime(0, 0, 0, 8, 16, 2003)); print_r(cal_from_jd($today, CAL_GREGORIAN)); ?> The above example will output: Array ( [date] => 8/16/2003 [month] => 8 [day] => 16 [year] => 2003 [dow] => 6 [abbrevdayname] => Sat [dayname] => Saturday [abbrevmonth] => Aug [monthname] => August ) SEE ALSO
cal_to_jd(3), jdtofrench(3), jdtogregorian(3), jdtojewish(3), jdtojulian(3), jdtounix(3). PHP Documentation Group CAL_FROM_JD(3)
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