A decent case can be made for March 1 as the start of the year. With March 1 as the start of the year the extra day in leap years then comes on the last day of the year. This makes dealing with leap years when calculating the day of the week from a date simpler.
It also makes the names of September, October, November, and December make sense. Those names come from the Roman words for 7, 8, 9, and 10, which were the numbers of those months in the old Roman calendar which did start the year on March 1. The Romans switch the start to January sometime around 700 BCE giving us the current ridiculous situation where those months are two months later in the year than their names suggest.