20 days and an extra month of 5 days.
The Mayan calendar Tzolk'in has 260 days. It is composed of 20 periods of 13 days each. These days are linked with 20 names and symbols.
31
because
8 to 10 weekend days per month. You will always have at least 8. There are 104 weekend days each year so you would have 8.6666 per month.
That would depend on how many days were in each month.
There are 30 days in a month and each day has 24 hours. This is how we calculate.
400
The Aztec year consisted of eighteen months, each having 20 days
Different months have different days, but approximately three (I used 30 days for each month).
365 days and its divided into 18 months. Each month had 20 days
It depends on the country and state/province.
Periods occur each month not each day Periods last a minimum of 5 days and can range to 7 days.