Yes (in the Jewish calendar)
Because that's what the Torah commands (Exodus ch.12).
AD is not used in the Jewish calendar. It is only used on the Gregorian (Christian) Calendar.
CHISLEV means "December." From a Jewish Calendar in the Bible.
No, the Jewish year has 365.25 days, just like the Gregorian, but the calendar is calculated differently. The Gregorian calendar is Solar, meaning it's based on the Sun; the Jewish calendar is Lunisolar, meaning its based on the Moon, but periodically corrected to match the Sun. By contrast, the Islamic calendar is Lunar and has only 354 days in a year.
Most of the annual holy days are concentrated in the month of Tishrei. However, Judaism doesn't have the concept of a holy month.
The Seder is on the first night of Passover which is the 15th of Nissan on the Jewish calendar. It corresponds to a different date each year on the Gregorian calendar. But is usually in the beginning to mid April.
The names of the months in the Jewish calendar in the order they appear: Nissan, Iyar, Sivan, Tamuz, Av, Elul, Tishrei, Cheshvan, Kislev, Tevet, Shevat, Adar (I and II). The Georgian calendar is based on the solar year, while the Jewish (and Muslim) calendar is based on the lunar year; therefore, correlation of holy days can only be done on an annual basis.
Jesus' birthday is not marked in the Jewish calendar.
Kislev is the 9th Month on the Hebrew Calendar, but its name has no Hebrew meaning other than the name of the month. The word was probably borrowed from another language, probably Akkadian.
It is the seventh month of the Jewish year, equivalent to Nisan of the modern Jewish calendar. As the Jewish calendar is different in length to the Gregorian calendar, there is not a directly corresponding month.
Jewish people.