Does 'month' in Thai visa terminology refer to a calendar month or a 28-day month?

The term 'months' in Thai visa documentation refers to calendar months, meaning the duration is measured from date to date. For example, a 'two-month seasoning' would span from July 1 to September 1, regardless of the varying lengths of the months involved. However, there is an exception concerning February, where one should account for additional days as it only has 28 days. There are instances where immigration officials may dispute the duration based purely on the number of days in a month.