This was a 24 hours crisis day for Isaac beginning at the start of the chapter.
Genesis 32:1Jacob also went on his way, and the angels of God met him.
Darby Bible Translation.
And he rose up that night, and took his two wives, and his two maidservants, and his eleven sons, and passed over the ford of the Jabbok;
In order to ford the Jabbok at its optimal time, they got up early before the day break.
23After he had sent them across the stream, he sent over all his possessions. 24So Jacob was left alone, and a man wrestled with him till daybreak.
He was left alone with the river before him. The wrestling is symbolic of his prayer time with God. It wasn't long, probably around an hour. At the end he was changed and his name was changed.
27The man asked him, “What is your name?”
“Jacob,” he answered.
28Then the man said, “Your name will no longer be Jacob, but Israel, because you have struggled with God and with humans and have overcome.”
The daybreak was the deadline to cross the river optimally. It symbolizes the new Jacob. He had cross from darkness into light. It was the bright day to meet his brother Esau.