I added this mod to an ATM9 server I am hosting for close friends and at first it ran perfectly. Then out of no where the sleep feature stopped working. The slower day and night still work correctly. I think it happens when there's only 1 person in the server. I am going to do more research when people get online and update this if I figure anything else out. Things I changed in the hourglass mod include day and sleep time set to 0.25 and I changed the sleep times to 0.25 then again to 0.1 to get slower sleep. I already tried increasing the sleep time back to 1 and no luck

It works with multiple people on the server. Just not when there is only 1 person.