How to set cron job to run last Thursday of every month at 2:00 AM

[chandra61446]

How to set cron job to run last Thursday of every month at 2:00 AM

[inventsekar]

* * * * *, correspond to minute hour day month day-of-week.

0 2 25-31 * 4

- 2am, on the thursday between dates 25 to 31,

[jkat54]

0 2 25-31 * 4

Can be read as: @ 2am, On days 25-31, every month, on Thursday

Hopefully there wont be more than one Thursday between 25th and 31st... call me if so 😉

It just so happens that the current month is a great example of how the 25th might be the last Thursday.

However, this will probably fail on some months with less than 31 days. So you really need one alert for each month:

0 2 25-31 1 4 = Jan
0 2 22-28 2 4 = Feb (will not work on all leap years)
0 2 25-31 3 4 = Mar
0 2 24-30 4 4 = Apr
0 2 25-31 5 4 = May
0 2 24-30 6 4 = Jun
0 2 25-31 7 4 = Jul
0 2 25-31 8 4 = Aug
0 2 24-30 9 4 = Sep
0 2 25-31 10 4 = Oct
0 2 24-30 11 4 = Nov
0 2 25-31 12 4 = Dec

Which simplifies to this:
0 2 25-31 1,3,5,7,8,10.12 4 = Jan, Mar, May, Jul, Aug, Oct, Dec
0 2 22-28 2 4 = Feb (will not work on all leap years)
0 2 24-30 4,6,9,11 11 4 = Apr, Jun, Sep, Nov

[s2_splunk]

I believe this is not quite correct, as it will run on days 25-31 AND on Thursdays. There is no way to do that easily that I know of.