This Precept does not in any way restrict the celebration of the Sacrament of Marriage, but only the solemn celebration of the nuptials from the first Sunday in Advent till the Epiphany, and from the first day of Lent till the end of the Easter octave. A solemn celebration means the special Mass for the newly married pair, the nuptial Benediction, and extraordinary wedding ceremonies. Such solemn ceremonies and festivities are not suitable in Advent and Lent, because these season are specially set apart for penitence and prayer.
505. What does the Church forbid in the Fifth Precept: Not to solemnize marriage at forbidden times?
In the Fifth Precept, the Church does not forbid the celebration of the Sacrament of Marriage; but only the nuptial solemnities, from the first Sunday of Advent until the Epiphany, and from the first day of Lent until Low Sunday.
506. What are the nuptial solemnities which are forbidden?
The nuptial solemnities forbidden by this Precept are the celebration of the nuptial Mass, the nuptial Benediction, and marriage festivities on a large scale.
507. Why are marriage festivities on a large scale out of place in Advent and Lent?
Pompous displays are out of place in Advent and Lent because these seasons are specially consecrated to penance and prayer.