Holy Thursday starts Triduum. Beginning with the Evening Mass of the Lord's Supper (the name for tonight's once-a-year Mass), the feeling of everything in church changes.
Oh, it's still Mass. In a way, Holy Thursday is more intimate, more personal than Mass on Sunday. And yet...
There's something about it. The way that it ends is different. Unsettling. There's a feeling that something's not right.
It's the calm before the storm.