>Polina,
>
>I have no idea what a Jewish calendar looks like, ...
It is actually quite interesting, accomodating both the sun and the moon. The months are moons; a year has either 12 or 13 months (moons), so that
on the average the length of the year corresponds to the Earth's orbit around the Sun.
For comparison, the Gregorian calendar is completely divorced from the moon, whereas the Islamic calendar has 12 moons, and a year is about 11 days short of the real year.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)