Elecciones en México
The “jornada electoral,” the day when citizens go to the polls, is held on the first Sunday in June of the election year. This uniform date, set by the 2014 political-electoral reform, allows federal and local elections to be held on the same day.
Older materials may mention July: federal elections used to be held then, and the presidential election of July 1, 2018 was the last one on the old calendar.