A temporary rift in the space-time continuum that makes up all reality opened briefly across the Northern and Southern Hemispheres of Earth on Monday, temporarily relocating parts of North America a full day ahead of Australia, instead of the other way around.
Although it seemed dangerous at first, unscrupulous people in the North took advantage of the flip-flopped calendar to copy winning lottery numbers and sporting scores, and email them to accomplices in Australia and New Zealand who would then place wagers on drawings and contests that were yet to happen. The run on casinos and books were picked up by authorities Western nations in the "Five Eyes" intelligence alliance, which didn't refused to confirm reports that the matter had been referred to the British Unified Intelligence Task Force (UNIT).
Governments have been loath to comment on the matter, partially because the hundreds of millions of people involved seem not to remember that it even happened. Only a few scant records of the temporal shift exist on the Internet, and most people appear to be chalking them up to glitches or faulty data entry.
Those whose memories weren't adversely affected report the appearances of an antique blue UK police box in areas where it shouldn't have been - most notably, Chicago, Illinois in America and Melbourne, VIC. A short-tempered Scottish man described variously as a physician or scientist of some sort was sighted in the vicinity of the police box shortly before witnesses said it vanished.