71 We pray most fervently, and ask others likewise to pray for this much-desired pacification of society, especially at this moment when after twenty centuries the day and hour approach when all over the world men will celebrate the humble and meek coming among us of the Sweet Prince of Peace, at whose birth the heavenly hosts sang: "Glory be to God in the highest; and on ,earth peace to men of good will." ( Luke ii, 14)
Source: Ubi Arcano Dei Consilio (Vatican.va)