The Common Calendar uses the same twelve months of the year as we do now, but with different lengths. Every year will start on Sunday 1 January, and every quarter year (not just year, but... QUARTER YEAR) will be identical. The first month of each quarter year (January, April, July and October) will start on a Sunday and have 31 days, finishing on a Tuesday. The second month (February, May, August and November) will start and end on a Wednesday and will each have 29 days. The final month (March, June, September and December) will start on a Thursday and have 31 days, ending on a Saturday and thus allowing the following quarter year to begin on the Sunday previously mentioned. As a result, Christmas Day (25 December) and New Year's Day (1 January) will always, without exception, fall on Sun