Toggle Modules on or off at a certain time with Rules I'm looking for a way to toggle a Module on or off based on the time of day using Rules. Ideally, the logic behind it would be something like:

IF

The time is between 1700 and 0900 AND Module X is turned OFF

THEN

Turn Module X ON

ELSE IF

The time is between 0900 and 1700 AND Module X is turned ON

Turn Module X OFF

ELSE

Turn Module X OFF


I'd like this to run with each CRON run (15 minutes). Is this achievable using Rules and without going into PHP?
Since you run cron in every 15 minutes, you can use module_disable or module_enable in hook_cron of your module. Using 

format_date(time(), 'custom', 'l j F Y');


you can get the current date and time. What is difficult for you to build such module?