EI offered the daytime flight from JFK-DUB this past summer (roughly June 9 to August 31). It left JFK at 12 noon and arrived DUB at 2340 Irish time. I took this flight on June 9 with my 1-year-old son, in hopes that it would help him sleep and adjust to the time change better.

We flew up from RIC-LGA on Delta the previous day, spent the night at a hotel in Manhattan and then took an Uber to JFK at around 0930. Check-in at JFK T5 was very easy, with no lines whatsoever, and the flight was only around 60% full. There were also no lines at Irish immigration that late at night; we rented a car from Hertz, stayed at a hotel near DUB airport and both got a good night's sleep.

I much prefer the day flight to a redeye and hope it comes back next year!