Day/Night inconsistency

My clan haven’t played Rust in a while and decided to come back to it with our own hosted server. We’ve got it all set up and running but there’s an odd inconsistency with the day night cycle. Two of us can be stood next to each other and for one of us its the middle of the night and for the other it’s bright sunlight.

Is this a known bug or is there a server setting somewhere to force all clients onto the same server time?