I've had a query about how I have been setting the time on the LED clocks I've made. Well, it depends. When I replaced the LED driver board on my old Cascade LED clock radio, I didn't bother with any buttons etc., so the only way to set the time is to reprogram it.
This sets the time to the system time and date at the point of programming. I then comment the line out again and immediately reprogram it, or it would reset to that that time each time power was applied.