How to restrict diald only to work one hour per day?

> is it possible to restrict diald only to work at e.g. one hour per day?
>
> and how? (config file, cron-job, etc.)

>From the diald man page:

       restrict <start> <end> <weekdays> <monthdays> <months>

       or-restrict <start> <end> <weekdays> <monthdays> <months>
              Normally filter  rules  apply  at  all  times.  The
              restrict statement makes all filter rules following
              the restrict statement, up  to  the  next  restrict
              statement, apply only at the times indicated by the
              restrict statement.

See the man page for more details.