January 1 is the first day in the Gregorian calendar that counts 365 days as a year. The Gregorian calendar is the Christian calendar and the most accepted civil calendar in the world.
Thirty days have September,
April, June and November.
All the rest have thirty – one,
Excepting February alone,
Which has twenty – eight clear,
And twenty – nine in each leap year.
But there are other calendars. Do you know when Chinese New Year starts? . http://www.apples4theteacher.com/holidays/chinese-new-year/when-is-chinese-new-year.html.
Do you know how many days has Islamic calendar got?. http://en.wikipedia.org/wiki/Islamic_New_Year .