Why don't all months have same number of days?
Why do months have different number of days? I mean they vary from 28 to 31. Why not have an approximate average?
How many days are in a month? Why do we have 28 or 29 days in February, where as July and August have 31 days consecutively? Why the month February has only 29 days? Why do the 30 day months go quicker than the 31 day months? Why isn't there 13 months in a year? Why do July and August both have 31 days consecutively? Why are days of the year biased toward certain days of the week? Why are there seven days in a week? Why does february has 28 or 29 days only? Why there are 7 days in a week? Why week and month are used to time pregnancy instead of day? Why does February have 28 days? Why 29 in leap years? In a non-leap year, which is greater: the mean number of days per month or the median number of days per month? Why does February's 29 days come after 4 years? What are the historical reasons as to why February has 28 days? Why are there only 7 days in a week? Why did many ancient calendars have only 360 days in a year? Shouldn't they have known that it is actually closer to 365 days? How many days are in a week? When people say "in a couple of days" how many days do they mean? Why does the 29th of February only come every 4 years? Which thing comes once in a year and twice in a month? How many weeks in year? Why does a day have 24 hours? Why is the extra day of leap year added only to the month of February? Why is February the month having the least no.of days, why not any other month? Why do women have their period once in 28 days? Calendars: Why did September 1752 have fewer days? Why does only February has 1 extra day in leap year? Why did I have a period that was 12 days early and lasted only for one day? Why did I period two time in one month? How many weeks are in a typical school year?