February 12, June 13, October 13
Chapter 10: How the Night Office Is to Be Said in Summer Time
From Easter until the Calends of November
let the same number of Psalms be kept as prescribed above;
but no lessons are to be read from the book,
on account of the shortness of the nights.
Instead of those three lessons
let one lesson from the Old Testament be said by heart
and followed by a short responsory.
But all the rest should be done as has been said;
that is to say that never fewer than twelve Psalms
should be said at the Night Office,
not counting Psalm 3 and Psalm 94.
This sure does piggyback on what I just wrote about adapting the RB to fit our non-monastic circumstances. St. Benedict sets the precedent. The nights are shorter in the summer. That is, daylight extends longer into the summer and if the monks were to follow the same prayer schedule as for winter, they’d be short on sleep.
Balance. Moderation. Concern for good health.