There are four weeks a year where Europe is on winter time and the U.S. remains on summer/DST resulting in a 4 hour difference between the US and UK and a 5 hour difference between the US and Continental Europe. UA like most airlines adjusts their TATL flights later during these weeks. Do the Polaris Lounges - particularly those in EWR and IAD with the most TATL departures - adjust their hours accordingly?