Ordo is the quietest room in the house: today in the Church, at a glance. A link to the day's Gospel reading, and — on a feast, memorial, or solemnity — the name of the saint the Church remembers, with a short life drawn from Alban Butler's Lives of the Saints (1894), now in the public domain.
The calendar comes from the General Roman Calendar; the Gospel text itself lives at USCCB, linked out rather than reproduced. Not every saint on the calendar has a matching entry yet — Butler wrote before many modern canonizations, and the page says so plainly rather than guessing.