It was the day when Jesus healed the man by the pool: "stand up, pick up your mat, and walk." And, John concludes the section with: "It was the sabbath."
Healing on the sabbath. As good of a day as any. Oh, and a clear violation of the practice and teaching of the ruling priests and the law, as they knew it. They would use this against him, too.
Such a trouble-maker.
Dear God, help us to be more like Jesus in this way. Especially in this way...
We'd be in good company.