A. We’re on a different calendar. The Secular calendar follows the Solar Cycle of 365 days each year, while the Jewish calendar follows the Lunar Cycle of 354 days (yet we are different than the Muslim’s strictly lunar reckoning, for we date our seasons by the sun, using leap years to make up the 11 day annual discrepancy – this is how Passover is always in the Spring, while Ramadan can be during any season). So while the New Year is always on the first day of the Hebrew month of Tishrei, same Hebrew date every year, on the secular calendar it will be a different day in September or even early October.