There is a server command if you are an admin that will do this. That command is /day . The only way to reverse this is to change the TimeOfDayScale back to 48, so I would check what that is set to on your server.
It can be found under Simulation->Config->TimeOfDayScale
Or modify the EcoSim.eco - you will see this probably near the end of the file
See if this works for you