Every Feral heart day (1 cycle of day and night) takes 2 hours exactly. at least im sure in map maker.
Every map loaded for the first time start with the sun at 1/4 of the day. (when a map instance is created in the server for the first time)
this mean this:
-at 15 minutes is midday
-at 45 minutes is late afternoon
-at 1hour 15 minutes is midnight
-at 1 hour 45 minutes is the dawn.
-at 2 hours the cycle is complete and it is 1/4 of the day again.
the time managed in the sky maker is the time in seconds/3, this mean, every 3 seconds the time counter will increase in 1 unit.