How should the dates change for a passenger of an airplane in the near future, who, keeping score in standard time, flew from Leningrad (zone 2) to the west at noon on July 1 and circled the Earth in parallel in 12 hours?
From 1 to 2 July when crossing the date change line from 2 to 1 July when entering the 2nd zone, from 1 to 2 July at the time of landing.
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