Equity theory, most popularly known as equity theory of motivation, was first developed by John Stacey Adams, a workplace and behavioral psychologist, in 1963.
On average there are about 4.3 weeks in a month. Each week is 7 days, and there are normally either 30 or 31 days in a month, so there are usually between 4.2 and 4.4 weeks per month. The exception is February because it has fewer days, so there are about 4 weeks in that month. On average there are about 4.3 weeks in a month.
21.67 days per month. There are 52 weeks in the year with 5 working days each = 260 days, and when divided by 12 months = 21.67 days. Weekday holidays are also included. I would say this to be more a accurate calculation: Would it not be correct to say on average there are 365.25 days a year (365 normally 366 every 4th year).