Here are the positions of the sun and moon on the day of the battle. The weather was clear.
U.S. Naval Observatory
Astronomical Applications Department
Sun and Moon Data for One Day
The following information is provided for Dalton, Whitfield County, Georgia (longitude W85.0, latitude N34.8):
Sunday, 15 May 1864 Eastern Standard Time
SUN
| Begin civil twilight | 5:08 a.m. |
| Sunrise | 5:36 a.m. |
| Sun transit | 12:36 p.m. |
| Sunset | 7:36 p.m |
| End civil twilight | 8:04 p.m. |
MOON
| Moonrise | 1:16 p.m. on preceding day |
| Moonset | 1:58 a.m. |
| Moonrise | 2:10 p.m. |
| Moon transit | 8:22 p.m. |
| Moonset | 2:28 a.m. on following day |
Phase of the Moon on 15 May: waxing gibbous with 68% of the Moon’s visible disk illuminated. First quarter Moon on 13 May 1864 at 1:19 p.m. Eastern Standard Time.
They All Wore a Star 
Why do they call it Civil time?
On Sat, Nov 14, 2020 at 1:30 PM They All Wore a Star wrote:
> rgmiller41outlookcom posted: ” Here are the positions of the sun and moon > on the day of the battle. The weather was clear. U.S. Naval Observatory > Astronomical Applications Department Sun and Moon Data for One Day The > following information is provided for Dalton, Whitfield ” >
Starting at midnight instead of noon. How was midnight determined? A guess is the observatory used the position of sun relative to Dalton on that date. But the overhead peak is not listed as exactly 12:00, raising more questions. Ask the Navy š
Should have been able to see pretty well after sunset. Might not have wanted to though.
On Sat, Nov 14, 2020 at 2:30 PM They All Wore a Star wrote:
> rgmiller41outlookcom posted: ” Here are the positions of the sun and moon > on the day of the battle. The weather was clear. U.S. Naval Observatory > Astronomical Applications Department Sun and Moon Data for One Day The > following information is provided for Dalton, Whitfield ” >