I have seen this day&night cycle many times (not sure if on aloha.pk), but the idea is pretty cool, the colors of evening, night, morning and day, but there is one quite BIG mistake. No matter how you change the fog colour, the ground blocks stay well lit as it would be day.
My suggestion is that everytime night comes, there should appear about 5 block thick roof (it’s possible with pyspades I think). I dont know if this is gonna work as planned, but it’s worth trying ???. Maybe you can change the lighting without adding any blocks?
I’m fairly certain no aloha servers have the day/night script (maybe zombies and tdm, but I think not).
For suggestions and such you should probably got to the official forums.
Good luck.