“...who better than the heir to Peter better fits the type Jude is using?”
I’d say, based on geography, either the Patriarch of Alexandria or the Patriarch of Jerusalem.
“What, you never heard of evening mass on saturday and sunday?”
I knew about Saturday masses “counting” (though if they are before 6:00 PM I don’t understand how or why), but I can’t say as I have heard of Sunday evening Masses.
And your reasoning for a 'basis in geography,' other than simple petulance, is...?
Can. 202 §1. In law, a day is understood as a period consisting of 24 continuous hours and begins at midnight unless other provision is expressly made ...Can. 1248 §1. A person who assists at a Mass celebrated anywhere in a Catholic rite either on the feast day itself or in the evening of the preceding day satisfies the obligation of participating in the Mass.
In other words, Sunday evening is still Sunday, and the Saturday evening Mass satisfies the obligation not because it is Sunday aready in the Jewish sense, but because the canon explicitly allows it.