The following sample is taken from
http://www.microsoft.com/resources/d....mspx?mfr=true

schtasks /create /tn "My App" /tr c:\apps\myapp.exe /sc monthly /mo lastday
/m *

It create the taks to run on Day 31 of every month.

But if a month has only 30 days, the Task does not get executed.
Eg. Apr, Jun has 30 days. Not forgetting Feb 28 & 29.

One workaround it to create multiple schedule for one particular task. This
is tedious when there are lots of Schedule Task.

I believe it was "TBoon" <TBoon@discussions.microsoft.com>, who said in
message news:CAE702F8-C9BF-4A8C-AFEB-31DFF9BCFC61@microsoft.com...
> The following sample is taken from
> http://www.microsoft.com/resources/d....mspx?mfr=true
>
> schtasks /create /tn "My App" /tr c:\apps\myapp.exe /sc monthly /mo
> lastday
> /m *
>
> It create the taks to run on Day 31 of every month.
>
> But if a month has only 30 days, the Task does not get executed.
> Eg. Apr, Jun has 30 days. Not forgetting Feb 28 & 29.
>
> One workaround it to create multiple schedule for one particular task.
> This
> is tedious when there are lots of Schedule Task.
>

Looks like a bit of a bug, but there are numerous ways you could get around
it eg....

(1) A script / batch file taking the name of a task as parameter and setting
up the multiple schedules
(2) Making the last action of the task a rescheduling of itself to the last
day of the next month
(3) Scheduling for the 1st day of the month, rather than the last day


--
Jon