Maundy Thursday gets its name from the Latin word mandatum, which means "commandment." Near the end of the Last Supper, after Judas had departed, Christ said to His disciples, "A new commandment I give unto you: That you love one another, as I have loved you, that you also love one another."
The name Maundy Thursday is today more common among Protestants than among Catholics, who tend to use Holy Thursday, while Eastern Catholics and Eastern Orthodox refer to Maundy Thursday as Great and Holy Thursday.
You can find the date of Maundy Thursday in this and future years in When Is Holy Thursday?
The Days of the Easter Triduum:
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