Go back and read what you wrote. You don't understand what "solemnize marriage" means. You are equating that with receiving the sacrament of matrimony. Your Baltimore Catechism is correct, you are incorrect.
I know someone who was married during lent but only because one party was not catholic, ergo no sacrament.
I know someone else who was not allowed to get married during lent because they were both catholic, ergo sacrament.
Maybe I am explaining it wrong, but it is clear to me that the sacrament of matrimony cannot be given or received during forbidden times.
The sacrament of matrimony has nothing to do with a priest. He is only a witness.