Timers are not really meant for the type of task you are talking about.
Timers are more for the purpose of executing a task every 8 hours or every 30
min...
I would use VJ's solution from your previous posted question ("how to
schedule operations"). It's cleaner and you can change the time/frequency of
the execution without having to change code as well as being able to make
much more complex schedules than with Timers (e.g. Mon Weds and Fri at 16:00).