It is going to be...

Well, It's going to be New Year. A new year? Why is it going to be New Year? In a conventional manner it's going to be New Year because 365 days havelapsed from the last S. Sylvester day. Why do we celebrate New Year? Why do we celebrate this day?

Cultures that measure yearly calendars all have New Year celebrations and the others one? Why do we celebrate New Year. In the Gregorian calendar New Year is celebrated but in the others calendars?.

The ancient Roman calendar had only ten months and started the year on 1 March, which is still reflected in the names of some months which derive from Latin: September (seventh), October (eighth), November (ninth), December (tenth). Around 713 BC the months of January and February were added to the year, traditionally by the second king, Numa Pompilius, along with the leap month Intercalaris.

The year used in dates was the consular year, which began on the day when consuls first entered office — fixed by law at 15 March in 222 BC[1], but this event was moved to 1 January in 153 BC. In 45 BC, Julius Caesar introduced the Julian calendar, dropping Intercalaris; however, 1 January continued to be the first day of the new year.

Why do we celebreate New Year?
Just consumism or....friendship?