For those of you who don't know, today is Holy Thursday. That's the day when Jesus had the Last Supper. You know - he invited all of his buddies over, had bread and wine, and commissioned Leonardo da Vinci to paint a mural about it.
(Oh and apparently, Wikipedia calls it Maundy Thursday which sounds like Monday Thursday but that's just too confusing.)
Anyway, that means yesterday was the day before Holy Thursday. That's when Jesus had the lesser-known Next to Last Supper.