Well spotted. Maybe they've slipped us into a time warp and done it one day at a time hoping we wouldn't notice. Now Hyndburn is so advanced we're two days ahead of the rest of the world!
I noticed this last week when I rung up ref my physio appointment and argued with them that they had given me the wrong date for the day. How much of a prat did I feel when I came off the phone and realised what was wrong with my calendar (after studting it for a few minutes.............)