Data for Sofia, 2014.

Latest sunrise: 3 Jan, 07:57
Earliest sunset: 10 Dec, 16:53
Earliest sunrise: 15 June, 05:48 (DST)
Latest sunset: 27 June, 21:09 (DST)
Winter solstice: 9h 2m
Summer solstice: 15h 20m
Real equinoxi: 17 Mar & 26 Sept
dt max: 3.1-3.4 minutes/day