Google Calendar is a calendar service that sends notifications to users via email [1] [2] [3] [4] [6]. Users can add line items to their Google Calendar and receive emails with the typed-in text at the designated time [2] [5]. The service allows users to manage their accounts and notifications on their phones [1] [5]. Google Calendar sends notifications for events, such as a meeting with Francois and canceling Nicolas' tickets on November 19, 2018, from 5:30am to 6am EST [3]. It also sends notifications for events like Dr. Bard's visit from June 7 to June 12, 2018 [4], and a meeting with Anil Ambani on May 20, 2019, at 8:30am ET [6]. Users can change their notification settings by logging in to their Google Calendar account [3] [4] [6].