Question:
All Jewish holidays depend on Jewish Lunar calendar. Why only Shabbat we are celebrating according to the Christian Solar calendar on Christian Saturday?
Answer:
The Jewish calendar is a lunisolar calendar based both on the sun and moon. Our Shabbos is not based on the Christian Saturday but a continuation from the first Shabbos since the creation of the universe. On the contrary our Shabbos came well before the Christians eventuated.
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