The Incas had lunar months, so they had 12 months like us, but I’m not sure if they divided the months into weeks of 7 days, forgive my ignorance.
Almost everyone names the months and days of the week by their names in Spanish, so it is not necessary to learn their Quechua equivalents to be able to communicate with a Quechua-speaker, but it can be interesting to learn.
Months of the year in Quechua
Keep these words in mind: