The Armenian calendar is the traditional calendar of Armenia whose Era is Julian July 11 of 552 AD. It is a solar calendar based on the same system as the ancient Egyptian model, having an invariant 365-day year with no leap year rule. As a result, the correspondence between it and the Julian calendar slowly changes over time (such as year 761 on 1312 AD Jan 1, year 762 on 1312 AD Dec 31, and year 1032 on 1582 AD Oct 25 = Gregorian Nov 4). Some references report that the first month of the year, Nawasardi, corresponds to the start of Spring in the northern hemisphere, but that was only true from the 9th through 10th centuries. The new Armenian year that begins in AD 2008, year 1458 of the Armenian Era, falls on July 26th at 1:52 Eastern standard.