What most don't realize is that the calendar you use in itself is completely Pagan, and non-biblical.  The Biblical Calendar should be based on the New Moon, however pagan tradition has converted the calendar to a nationality based on idolatry with each month named some way, shape, or form after a pagan tradition or "God".

The Gregorian Calendar

Months

Days of the Week

Sources

https://www.almanac.com/content/how-did-months-get-their-names
https://www.almanac.com/origin-day-names