01-03-2011
Further to "purdym".
The whole year can be scheduled positively with 12 lines in crontab (each of which fires on two days-of-the-month within each the calendar month number). With this approach you must only specify day-of-month and not mention day-of-week or the cron will fire incorrectly.
Btw. The method using the unix "cal" command is awesome. Depending on the requirement it may go wrong if Bank Holidays are not deemed Business Days. Otherwise it seems perfect.
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LEARN ABOUT PHP
cal_to_jd
CAL_TO_JD(3) 1 CAL_TO_JD(3)
cal_to_jd - Converts from a supported calendar to Julian Day Count
SYNOPSIS
int cal_to_jd (int $calendar, int $month, int $day, int $year)
DESCRIPTION
cal_to_jd(3) calculates the Julian day count for a date in the specified $calendar. Supported $calendars are CAL_GREGORIAN, CAL_JULIAN,
CAL_JEWISH and CAL_FRENCH.
PARAMETERS
o $calendar
- Calendar to convert from, one of CAL_GREGORIAN, CAL_JULIAN, CAL_JEWISH or CAL_FRENCH.
o $month
- The month as a number, the valid range depends on the $calendar
o $day
- The day as a number, the valid range depends on the $calendar
o $year
- The year as a number, the valid range depends on the $calendar
RETURN VALUES
A Julian Day number.
SEE ALSO
cal_from_jd(3), frenchtojd(3), gregoriantojd(3), jewishtojd(3), juliantojd(3), unixtojd(3).
PHP Documentation Group CAL_TO_JD(3)