When and Why Did Sunday Become the First Day of the Week?

Discover how Sunday became the first day of the week through Christianity and the Gregorian calendar.

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Sunday became the first day of the week with the arrival of Christianity, which adopted the Hebrew calendar. While traditionally Saturday was the sabbath, Christians began observing their Sabbath on Sunday to honor Jesus' resurrection. The Gregorian calendar, used widely today, also considers Sunday as the week’s starting point.

FAQs & Answers

  1. Why is Sunday considered the first day of the week? Sunday became the first day of the week primarily due to Christianity adopting the Hebrew calendar tradition and shifting the Sabbath observance to Sunday to honor Jesus' resurrection.
  2. When did the Gregorian calendar start using Sunday as the first day? The Gregorian calendar, introduced in 1582, widely adopted Sunday as the starting day of the week, reinforcing the Christian tradition.
  3. What day was originally the Sabbath before Sunday? Traditionally, Saturday was observed as the Sabbath in the Hebrew calendar before Christianity began to observe Sunday as the Sabbath.

Watch More

For more insights on calendar history and the origins of our weekly structure, explore related videos on the evolution of the Gregorian calendar and the role of religion in shaping modern timekeeping.

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