Here are the elements that make up the Jewish calendar:

• The day comprises the day-time and the preceding night. It does not span from midnight to midnight ; rather it starts with night fall, until the next night^[1].
• The week is the group of seven days ending with the Shabbath (from Friday evening to Saturday evening). The first day of the week is Sunday (beginning Saturday night after Shabbat).
• The Shabbat is the seventh day of the week. That was the day God rested after creating the world in six days^[2].
• The month is linked to the rotation of the Moon around the Earth. This is the period between two new moons in a row.
• The year is a set of lunar months. But the Jewish ritual also follows the rhythm of the seasons. The Jewish year is a lunisolar combination.