Reminder to people who have international meetings: the next week is George W Bush Golfing Time. The USA and Europe had an agreement to move clocks at the same time, so the time difference remained constant. George W Bush decided he wanted a few weeks more golfing time, so unilaterally moved the USA’s Daylight Saving Time. This move remains in effect so there are a few weeks of annoying disruption each year.
I made the mistake of flying the first time this happened, which is how I knew about it: the airlines were unprepared and sold me tickets on two flights where the time change meant that my slightly tight 45-minute change turned into a -15 minute connection time (fortunately the second flight was on a route they flew every two hours so I was only an hour late)l