I still cant use print2digits.
I can't juggle horses, either. I'm sure that it will be a lot easier for you to guess why I can't juggle horses than for me to guess why you can't use print2digits.
Why not using Serial.print(tm.XXX)? This works for me.
If you wish, for some reason, to print the hour as 2 digits, when it is 2:00 AM, then that will NOT work, because print() does not print leading 0s.