The day Thursday was named after Thor one of the Vikings main
gods.
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The Romans did not have a contemporary 7-day week. Therefore,
there is no Latin word for "Thursday," unless one was created later
by the Catholic Church. Also note that the days of the week in
English come from Norse mythology. (i.e. Thursday is Thor's
day.)
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Other names for Holy Thursday are:
Maundy Thursday Clean Thursday, Great Thursday, Green
Thursday,Holy and Great Thursday, Red Thursday, Sharp Thursday,
Sheer Thursday, Shrift Thursday, Thursday of the Mystical
Supper.
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Thursday is named Thursday because of Thor. In Danish (and
probably Norwegian and Swedish, too) Thursday is torsdag.
Thursday/torsdag is a tribute to Thor. Thor's Day -->
Thursday.