Because math are numbers which are needed to work out years, months, weeks and days of the calendar
In weeks of 7 days, three months can be 12 weeks and 5 or 6 days, or 13 weeks, or 13 weeks and 1 day. There are at least 4 weeks (28 days) in every month, but the number of days varies. Some months have 30 days (April, June, September, November) and some have 31 days (January, March, May, July, August, October, December). These months can be arranged in either 5 or 6 calendar weeks, with at least three 7-day weeks in the middle. February, with 28 days (29 in leap years), can be 4 or 5 calendar weeks. Similarly, a period of three months can be either 89, 90, 91, or 92 days, arranged in at least 12 weeks of 7 days (84) or 13 weeks (91 days), with the largest possible number of separate calendar weeks being 15.
83333 and 1/3 years.
Being that there are 52 weeks in a year and 36 months is three years, the answer is 156 weeks.
I believe that would be a calendar http://en.wikipedia.org/wiki/Calendar#Physical_calendars
99 weeks equals 1 year, 10 months and 3 weeks calendar years
It is made of days, weeks, months, and years, just like the western calendar.
Because math are numbers which are needed to work out years, months, weeks and days of the calendar
Calendars were invented thousands of years ago. It is divided into days, weeks, and months.
Seconds , minutes, hours, days, weeks months , years, etc.
There are 35 days in 5 weeks, and no months have more than 31 days. So on that basis, no month can ever have 5 weeks. However, a month can be spread over part of 5 or even 6 different calendar weeks, like if a month of 30 or 31 days began on a Saturday. With the exception of February in a non-leap year, every month will be in a least part of 5 calendar weeks. In different years different months will do that, as when months start changes from year to year.
The correct spelling is calendar (list or diagram by days, weeks, months, or years).The similar word is colander, a type of kitchen strainer.
156 weeks are in 3 years. 52 weeks are in 1 year, and 104 weeks are in 2 years.
Earth years are measured with a calendar.
Years are typically measured using a calendar, which consists of months, days, and years. The Gregorian calendar, which is widely used today, organizes time into 12 months with varying numbers of days per month.
In weeks of 7 days, three months can be 12 weeks and 5 or 6 days, or 13 weeks, or 13 weeks and 1 day. There are at least 4 weeks (28 days) in every month, but the number of days varies. Some months have 30 days (April, June, September, November) and some have 31 days (January, March, May, July, August, October, December). These months can be arranged in either 5 or 6 calendar weeks, with at least three 7-day weeks in the middle. February, with 28 days (29 in leap years), can be 4 or 5 calendar weeks. Similarly, a period of three months can be either 89, 90, 91, or 92 days, arranged in at least 12 weeks of 7 days (84) or 13 weeks (91 days), with the largest possible number of separate calendar weeks being 15.
There are about 24 months (2 years) in 104 weeks.