The two days Jewish New Year's feast Rosh Hashanah, which means “head of the year” in English, is observed from 10. September until 01. September 2018 and is always celebrated 163 days after Passover. According to the Jewish calendar that would be the 1st and 2nd of Tishrei.
We have placed a detailed description of this event on this page: Rosh Hashanah 2017. For further information please stop by there!