Was there ever a calender that had a year of 364 days?

Yes, there have been calendars with a 364-day year, most notably the ancient Egyptian calendar, which consisted of 12 months of 30 days each, plus an additional five days added at the end of the year for festivals. This structure resulted in a year that was close to the solar year but did not account for the extra fraction of a day in the Earth's orbit. Additionally, some interpretations of religious calendars, like the Essene calendar used by certain Jewish sects, also featured a 364-day year.