Original sentence: A third flight, again with Jeffries, was the first flight over the English Channel, taking about 2½ hours to travel from England to France on 7 January 1785, flying from Dover Castle to Guînes
Edited sentence: A third flight, again with Jeffries, was the first flight over the English Channel, taking about 2½ hours to travel from England to France on 1 July 1785, flying from Dover Castle to Guînes