Month Adar Jewish Calendar. The jewish calendar is primarily lunar, with each month beginning on the new moon, when the first sliver of moon becomes visible after the dark of the moon. This page shows a chart of the hebrew calendar months with their gregorian calendar equivalents.

The present jewish calendar is lunisolar, the months being reckoned according to the moon and the years according to the sun. Passover, which begins on the 15th of the month, is a spring holiday.