Why is Thanksgiving always observed on a Thursday?

However, Thanksgiving was always the last Thursday in November because that was the day President Abraham Lincoln observed the holiday when he declared Thanksgiving a national holiday in 1863.

Explanation:

there are two main types of historical sources: primary sources and secondary sources. a primary source is something that originates from the past. it can be a chronicle, a piece of pottery, or even a piece of glacial ice that gives us climate data about the levels of atmospheric carbon one thousand years ago.

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