On 6/17/20 12:37 AM, Steve Allen wrote:
Tour Eiffel may have broadcast one last set of midnight pulses on old Paris Mean Time at the June 30/July 1 boundary, or they may have omitted those pulses and waited until new 10:45 the next morning.
The French regulations quoted in <https://mm.icann.org/pipermail/tz/2020-June/029101.html> say that the old-style signals should be broadcast “Jusqu’a la nuit du 30 juin 1911 exclusivement” and that the new-style signals should be broadcast “A partir de la nuit du 30 juin an 1er juillet inclusivement”. The “exclusivement” and “inclusivement” suggest that the new-style signals should have won at the boundary, i.e., that the Eiffel Tower's last old-style signal was at 1911-06-30 11:04:00 Paris Mean Time and the first new-style signal was at 1911-06-30 23:45:00 GMT which temporally preceded what would have been the next old-style signal (1911-07-01 00:00:00 Paris Mean Time = 1911-06-30 23:50:39 GMT).