St. Patrick's Day Festival! When Irish Eyes Are Smiling, John McCormack

 From 500 Best Irish Jokes and Limericks:  Finnegan's phone rang in the small hours of the morning and it was Hourihan who wanted to know the time.

" 'tis four o'clock in the morning."

"Thanks," said Hourihan, 'I hope I didn't disturb you."

"Not a bit of it. Sure I had to get up to answer this phone anyways!"