I'm not sure if anyone cares, but I've created my own (non-canon) calendar for the Final Empire.
It's a 16 month year, with 4 months per season, and 4 weeks of 8 days each per month. Each of the months are named after one of the people who went with the Lord Ruler on his quest for the Well of Ascension (who became the patriarchs of the noble families).
I named them as follows: Odile, Alain, Boutet, Lorraine, Aubert, Celise, Levett, Genet, Lucien, Silvain, Chandrelle, Remy, Adelise, Jaquard, Chardin, Marvette.
Each day of the week is named after a base metal, Tinday, Pewterday, Steelday, Ironday, Zincday, Brassday, Copperday, Bronzeday.