Your imagination is real good, but all the times are set so there's no need to guess/speculate.TRM said:
4 matches per day during the group stage except for matchday 3, so I imagine windows at 1 pm, 4 pm, 7 pm, and 10 pm (ET).
Link below even puts it in local time:
https://www.fifa.com/en/tournaments/mens/worldcup/canadamexicousa2026/scores-fixtures?country=US&wtw-filter=ALL