Looking at this from a New York City timezone perspective. Posting just before lunch time is the best time.
| UTC | -5 UTC | Standard |
|---|---|---|
| 12:00 - 12:59 | 07:00 - 07:59 | 7:00 - 7:59 am |
| 13:00 - 13:59 | 08:00 - 08:59 | 8:00 - 8:59 am |
| 14:00 - 14:59 | 09:00 - 09:59 | 9:00 - 9:59 am |
| 15:00 - 15:59 | 10:00 - 10:59 | 10:00 - 10:59 am |
| 16:00 - 16:59 | 11:00 - 11:59 | 11:00 - 11:59 am |
| 17:00 - 17:59 | 12:00 - 12:59 | 12:00 - 12:59 am |
| 18:00 - 18:59 | 13:00 - 13:59 | 1:00 - 1:59 pm |
| 19:00 - 19:59 | 14:00 - 14:59 | 2:00 - 2:59 pm |
| 20:00 - 20:59 | 15:00 - 15:59 | 3:00 - 3:59 pm |
I am a little surprised that Sunday is better than Saturday, but I guess I shouldn't be.