Setting the sunrise and sunset sometimes goes wrong

[PropaneDragon]

Users have noted that sunrise is happening very late on in the day. Could this be to do with the 24 hour clock, or a conversion between the slider and the game's time?

[bloodypenguin]

Two more possible cases:

1. Lat/long affecting that in some way
2. Whatimizit mod by S.Klyte installed at the same time