“A new commandment I give to you, that you love one another: just as I have loved you, you also are to love one another” (John 13:34).
Maundy Thursday is the the last Thursday before Easter.
“The word Maundy comes from the Latin word mandatum, meaning ‘commandment.’ Therefore, the Maundy Thursday service celebrates the Last Supper with the disciples, along with the command Jesus gives them to “love one another as I have loved you” (John 13:34). This love is embodied through the act of foot washing.”
“The Last Supper and foot washing are events of great tenderness and intimacy, wherein Jesus invites His disciples to see that salvation is only possible through intimacy with Jesus all the way to the cross. In many ways, the Maundy Thursday service can help prepare worshipers to experience again the love of Christ and find the empowerment to walk with Jesus all the way to Calvary, which is not done alone, but together as a community.”
https://www.holinesstoday.org/death-before-resurrection-holy-triduum