You posted under Noma timer.
Noma timers are one of the names used for Woods timers.
You posted under 6-button outdoor timer.
Here is a link to 6 button outdoor Woods timer, to help identify your timer.
If this is not your timer, scroll through page to identify timer.
Manuals are posted with each timer, add a comment with specific timer number if you want me to write out steps from the manual once you identify the timer.
http://waterheatertimer.org/Woods-timers-and-manuals.html#6-24 6 button outdoor 7-day timer
6 button outdoor Week timer