An odd thing about making a trans-Atlantic crossing going west is that our destination is in a time zone (Eastern U.S.) that is six hours earlier than Western Europe. After leaving Barcelona, we will set our watches back an hour on six different days before reaching Florida.
Effectively this means we experience six different twenty-FIVE hour days, roughly one every other day. There is no jet lag, an hour at a time isn't enough to bring it on. Going east toward Europe results in six twenty-THREE hour days. Again, no trauma but strange nevertheless.
We flew to Europe to begin this cruise and experienced substantial jet lag. From west coast U.S. to continental Europe one goes from GMT minus 8 to GMT plus one, or nine hours difference. For several days after arrival we were sleepy during the day and wide awake at night. Flying home from Florida isn't such a big adjustment - maybe a couple of tired days.