Should we work on maundy Sunday? W
If you have to, you have to. It is not a Holy Day of Obligation. But by all means attend Mass and treat it as a special feast.
Holy Thursday (or, if you will, Maundy Thursday) is a minor Holy Day (certainly if compared to the Next Day).
Good Friday is (also) not a Holy Day of Obligation, but it has attached to it, a Day of Fasting (AND, no Meat-eating).
Thursday, at the Evening Mass, commemorates the Last Supper, and the service has a whole Bunch of “extras” in it.
But, the day itself is NOT a thing to worry about, especially for Working (or doing anything else).