Sun And Moon, Past And Present

The calendar is a well known utility known to us all, it is used to know what date it is.

Today I will show on the exihibition 2 kinds of calendars. One is a well known calendar used today, called the Gregorian calendar, and another less known, which is not used today, called A year and a day. They both do the same thing let us know what date it is but the way they do it is completely different.

The first calendar is the Gregorian calendar, which is used almost in every country in the world. Its based on the world cycle around the sun, and is very similar to the Julian calendar that had the same consept. It divides the year into 12 months with 30\31 days every month, and in Febuary(the second month) there are 28\29 days. The number of days in Febuary changes, becuase once every few years there is an extra day to be added so the holidays wont change date.

The second calendar is the a year and a day calendar, based on a lunar cycle around the world. It has 13 months in one year, and in calculation it has 364 days in a year. To fix this there is an extra day added, and it becomes a year and a day. But a year has 365.25 days, and this calendar has only 365, this changed the date the holidays are selebrated every the year.

You must be wondering, why I picked the a year and a day calendar, and not the Hebrew calendar as the lunar calendar exhibition. But there is a reason for this, the A year and a day was the official calendar in england for more than a millennium, befor(sp) they adopted the julian calendar and afterwards the gregorian calendar.

I Hope you enjoyed the exhibition.

Exits are on the left.

Please do not feed the animals.- very funny...

Resources :
http://en.wikipedia.org/wiki/Julian_Calendar
http://en.wikipedia.org/wiki/Gregorian_calendar
http://en.wikipedia.org/wiki/Lunar_calendar