User blog comment:Killerface45/Riddles!/@comment-11723493-20131130141046

they were born in the fall on the day that the clocks are set back one hour. Ike was born at 1:45am. Jack was born 5 minutes later. Since the clocks were set back at 2am, Jack's official time of birth was 1:40am.

(the year gave it away, so did the location)