One MUST think like a Jew and not a gentile to understand the biblical settings that take place in the Bible.
I'll see what I see from every perspective.
Take the Gregorian calendar, for example. Named after a pope name Gregory.
The masculine first name Gregory derives from the Latin name "Gregorius," which came from the late Greek name "Γρηγόριος" (Grēgorios) meaning "watchful, alert" (derived from Greek "γρηγoρεῖν" "grēgorein" meaning "to watch").
Mark 13
35 Watch ye therefore: for ye know not when the master of the house cometh, at even, or at midnight, or at the cockcrowing, or in the morning:
36 Lest coming suddenly he find you sleeping.
37 And what I say unto you I say unto all, Watch.
The G Calendar is the wrong calendar for Jesus’s day, He went by the Lunar
Don’t know what you are trying to say about Mark 13?