A standard month usually has 20 to 23 working days, which vary depending on weekends and public holidays, with the average being around 21-22 days when a normal Monday-Friday week is considered and holidays like January (22-23), February (19-21), and longer months like July or December (22-23) are subtracted. The precise count varies from month to month and year to year depending on the distribution of weekends and national/local holidays in the calendar.