Ontime
 

I would like to run a macro using the ontime method that would run the macro
every 30 minutes. The spin is that I need the macro to run not when the run
button is pressed, but rather wait until the half hour (top and bottom of the
hour) with a delay of 10 min past that half.
Example:
Current time: 3:52 PM
Start the macro
The macro will wait until 4:00 PM
The macro will delay the run until cell ("A3") IE. 10mins
Macro runs at 4:10 PM

I would appreciate any help with this problem!