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Why is Sunday marked in the color red on a calendar?

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June 01, 2010 10:07PM

Red Letter Days

Dating from the First Council of Nicaea (325 AD), holy days were marked in red on the church calendars. The practice was expanded following its use in the Book of Common Prayer (1549). In the Boke of Eneydos (1490), William Caxton referred to such feast days.

In Norway, Sweden, and other countries, red is used to indicate public holidays. In the US, many calendars are similarly marked.