Wrong forum (there's a sungazing forum :-) but I'll answer anyway.
Me personally, I sungaze every chance I get... no matter the time of the day. But that's not what I recommend... especially for someone just starting out.
The generally recognized safe hours are up to 1 hour after sunrise, and 1 hour before sunset. But for most people the intensity is too high about 15 minutes or so after sunrise, and until 15 minutes sunset.