The old arms showed a silver field with the cramp (or Wolfsangel as it is called in German) with an empty ring in the middle.
It may refer to the hunting rights granted Mommenheim in 1276 by Philipp von Hohenfels (in Germany the Wolfsangel is commonly held to be a kind of wolf trap).
Two weeks before this, on the fairgrounds there is always the MKV’s (Carnival club) Sommersonnenwendfeuer (“Summer Solstice Fire”).
Another famous regular event is the Open Air Music Festival in August organised by the Lautslochtrappers Mommenheim.
The festival is free of charge and held on a grass field near the Domtal Golfcours Mommenheim.