5:29 PM (36s)

for Sunday, December 15

other PHP date_sunset() parameters
latlonzenithgmto
34.249685 -84.140483 90.833333 -5

Sawnee Mountain Preserve, Cumming, GA, USA

On Feb 28, 2018, this is 2 minutes (rounding) later than TimeAndDate.com. Hopefully I will observe, over time, which is closer.

valid HTML5?