Night hours classicly were 8pm to 5am (seems to be the consensus from some research that Daldaen did some time ago before implementation here) The server is on a 7pm to 4am cycle. Levant stopped working beyond 4am here quite some time ago when it was patched as a night only spell (close to beginning of year I think) There's a ton of threads about this already. This one being the most pertinent:
http://www.project1999.com/forums/sh...ghlight=levant
But really doesn't matter - getting the same amount of hours it will work.