Ingday (or The Ingday) is a day created by Inglip, to be celebrated at Magshea. To celebrate it, gropagas must acquire an armadillo. Gropagas who fail to acquire an armadillo for Ingday are only able to atone for this crime by sacrificing a friend to Lord Inglip. Furthermore, such sacrifices are not allowed to be painless and Inglip commands the Gropagas carrying out the ritual to "stabste forehead".