If a year contains of 52 weeks, then why did we have 12 months of an unequal number of days rather than 13 months of 4 weeks each?
Why aren’t calendars designed with 13 months of 28 days each?
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? Calendars: Why did September 1752 have fewer days? Why do clocks have 12 hours? In what decade do you think paper calendars will be obsolete? Why the month February has only 29 days? What is shortcuts to remember which months has 31 days? Why do we have 28 or 29 days in February, where as July and August have 31 days consecutively? Why do the 30 days months go quicker than the 31 day months? What is a consecutive calendar day and how is it related with the Tranquility Calendar? Why does February's 29 days come after 4 years? Why do July and August have 31 days each? Why do the 30 day months go quicker than the 31 day months? Why does July and August has 31 days? How many days are in a month? Why can't the iOS Calendar app set a recurring event for dates such as 'the first Monday of each month'? Why does february has 28 or 29 days only? Why does the 29th of February only come every 4 years? Why do July and August both have 31 days consecutively? What are the most effective ways to use Google Calendar as a calendar for an organization? What is a consecutive calendar day and how is it related with the Badí‘ calendar? Why does the Mayan Calendar end on 12/21/2012? Why do some people only have 21 days period cycles? Why does our calendar include leap year? What is a consecutive calendar day and how is it related with the Julian calendar? What is a consecutive calendar day and how is it related with the Revised Julian calendar? Why does February have 28 days? Why 29 in leap years? Don't all countries have different times on clocks? What happens if periods are 5 days late? How many days a period can be late? How Google calendar is useful in daily life?