Yesterday at Mass, our priest sang the alleluia at the end of the response to the Vidi Aquam - and choir and congregation failed to imitate him (bumptious lot that they are, following the priest is almost always the correct thing to do in the liturgy, even if he is wrong in my view!), presumably spooked by the instruction in the Missal that says the Alleluia should be dropped out of Eastertide.
In reality, however, the priest was correct - Eastertide does not in fact end until the end of the Octave of Pentecost, next Saturday night. That's why the liturgy of Pentecost continues to be festooned with alleluias!
This Octave week does have its peculiarities however, most notably in having three Ember days set in amongst it. Ember days, you will recall, occur four times a year connected to the feasts of Christmas, Easter and Pentecost (plus one added to round things out!), and are special days of prayer and fasting. They are intended to act as a bit of a balancing factor the extended period of feasting we've been in.
Days of fasting and abstinence on first class feasts?
Wednesday, Friday and Saturday this week are traditionally (though no longer canonically) days of fasting and abstinence - which seems very odd given that they are also first class feast days, thus the Friday would, on the face of it, be exempt from Friday abstinence provisions.
But in fact this anomaly is explained by the fact that it is of recent creation, by Pius XII - prior to 1955, only Monday and Tuesday were doubles of the first class; Wednesday to Saturday were semi-duplexes.
So, the traditional practice is actually to observe the Ember Days as days of fasting and abstinence - and days particularly suitable for going to confession (and of course a reminder that if anyone hasn't yet made their annual confession (!), time is almost up!).