What is the Gregorian Calendar? The Gregorian calendar is the one used internationally by most of the world for determining what day it is. It’s divided into 12 months, from January to December, with each month possessing either a length of 30 or 31 days with the exception of February, which has 28 – and sometimes 29 – days. The reason for the little difference there is the existence of the leap year (have you ever thought: “Why do we have a leap year?”): every four years, February gets an extra day to make up for the inaccuracy between the … Continue reading The Gregorian Calendar (Western Calendar)