Today, then, seems to be a great opportunity to look at the variant in Matthew 24:36:
Περὶ δὲ τῆς ἡμέρας ἐκείνης καὶ ὥρας οὐδεὶς οἶδεν, οὐδὲ οἱ ἄγγελοι τῶν οὐρανῶν οὐδὲ ὁ υἱός, εἰ μὴ ὁ πατὴρ μόνος.
But concerning that day and hour, no one knows. Neither the angels of the heavens, nor the Son, except the Father alone.
The variant in question is the presence or absence of οὐδὲ ὁ υἱός.
According to the NA28: