Where do you find schedules for different games?

Hello r/sports! I have a strange question for you all. I work and a up a coming sports bar and was wondering where you guys get your information on upcoming games. I’m in charge of the TV system and the only place I can find some news on games is ESPN but it won’t tell me if a game has been postponed or canceled until the time comes for it to start. Any help would be amazing! Thank you!

Sincerely, someone who has no idea what they are doing.