We have timer switches for our outdoor light, but they’re confusing. I do not understand why there are numbers in two places, and I can’t tell which is AM or PM. Can someone please help? 
For the timer switches, set the current time first, then adjust the numbers for when you want the light to turn on and off. The AM/PM setting might be indicated by a small marker or switch. Check the manual if you’re unsure.
Timer switches can be confusing. There are usually two sets of numbers: one for the time and one for the days. Figure out which is which, and try setting a simple on/off time to start. If you’re still stuck, check the manual or experiment with the settings.