In Avestra, the months are related to the seasons/weather or some event. Meanwhile the eight days of the week were originally named after notable Eternals but I changed that since it gave a bit too much weight to their return. Fantasy-calendar did make it pretty easy to keep track of though.

Didn’t realize that I already posted the Eternal article but we roll with it! Worldbuilding wise, they were one of the core concepts for Avestra from the start that I carry between multiple fantasy worlds I’ve built so far.

Hence why it’s so easy to have them be as the start.