"When will Jesus return?"
When he's good and ready. He's the son of God, that means he makes his own hours.
Zechariah (remember him: one of those Jewish prophets that got stoned*) said this:
Zechariah 12:10
"And I will pour out on the house of David and the inhabitants of Jerusalem a spirit of grace and supplication. They will look on me, the one they have pierced, and they will mourn for him as one mourns for an only child, and grieve bitterly for him as one grieves for a firstborn son.
[*Luke 11:50-51]