Is "happen" really the best verb to put there? A moment isn't a phenomenon, is it?
te h'DEF.NOtalaqranow-ACC.NAT.SG ekkashiwanré,seize-2SG.IMP Maríbé!Maribor-NOM.F.SG Zeltetíranré!be_alive-2SG.IMP ot'ellanow-DAT.SG.NAT rebanréGIVE-2SG.IMP yentaládis,eternally-F.ADV letekséhàyocrown-GEN.SG.ARTIF ilof ri2SG.GEN zettúa!worldview-Ø.SG.NAT Otalanow-NOM.SG.NAT welt'during-TMP.SG.NAT Ossasky-Ø.SG.NAT yeresiagain avílla.NEG-be-3.SG.FUT
Seize the time, Maribor! Be alive! To now give always the crown of your worldview! During the universe, now will not exist again.