The Roman calendar which we follow has its origins back in ancient Rome. It changed its form several times between the founding of Rome and the fall of the Roman Empire. In that time, the advent of Spring was considered a harbinger of a beginning; thus the year back then used to start with March being its first month. Traditionally there were only 10 months in the Roman Calendar. Roman writers attributed the original Roman calendar to Romulus, the founder of Rome around 753 BC. The Romulus calendar had ten months with the spring equinox in the first month: Calendar of Romulus Martius (31 days) Aprilis (30 days) Maius (31 days) Iunius (30 days) Quintilis (31 days) Sextilis (30 days) Septembris (30 days) Octobris (31 days) Novembris (30 days) Decembris (30 days) The regular calendar year consisted of 304 days, with the winter days after the end of December and before the beginning of the following March not being assigned to any month, because the wintertime wasn't i...