Since I've had nothing better to do that look at the pictures for a bit, I'm confident that it was Sunday, 28th October 2012, with one set of photos starting ar

Since I've had nothing better to do that look at the pictures for a bit, I'm confident that it was Sunday, 28th October 2012, with one set of photos starting around 1pm facing north and another one used for filling in gaps a bit later - starting somewhere between 3pm and 4pm (harder to be precise - there are fewer clocks visible from this one).