semel in anno licet insanire

once in a year one is allowed to go crazy


Concept expressed by various authors, such as Seneca, Saint Augustine and Horace. It became proverbial during the Middle ages.


  • semela single time, even once, ever, for the first time, once
  • licetalthough, granted that, imper v, it is allowed, it is right, just, one may or can