4 in the afternoon.
All the time!
either 12 or 7
When I feel dozey, lol :-)
If I had to put a time in it is have to say 1-2, but honestly think anytime u put your head down and close your eyes is good. Unless ur operating machinery, or standing.
short nap...after lunch, at 3pm
Sleepy time is naptime.
Not late in the day .. or you can't get to sleep at a decent time at night.
Personally, I don't take naps. I just prefer to go to bed earlier if I'm tired.
The afternoon. :)