Add a toggleable button within the builders menu that lets you toggle between night time and daytime exclusively while you're in the build interface.
The way this would be able to be implemented is if inside the build menu, you toggle said option/press said button, the time changes quickly to the time selected (night or day) with a 3-5 seconds long transition (so players don't get flashbanged), after the user leaves the building menu, the time transitions again (like noted above) to the server time, then all is well :)
For the developers: this would be possible is by changing the time (clientsided) only when the user has toggled the option, and since it would be clientsided, that means that everyone else in the server wouldn't notice the change (because it is clientsided)

