Google Calendar experienced service issues, preventing some web users from accessing their calendars.

A service disruption occurred in Google Calendar, starting at 10:44 US/Pacific time on November 19, 2024, and ending at 12:24 US/Pacific time on the same day. The incident lasted for 1 hour and 40 minutes. The issue was global, affecting Google Calendar web users worldwide. A misconfigured traffic management rule was identified as the root cause of the problem, which blocked legitimate traffic. Google engineers mitigated the issue by rolling back the misconfigured rule. The problem occurred when users attempted to transfer calendar event ownership, resulting in some users being unable to access their calendars through the website. Mobile application users were not affected by the issue. Google will conduct a full investigation in the following days to provide a detailed root cause analysis. The incident may have caused inconvenience to users, and those who experienced impact outside of what is listed are advised to contact Google Workspace Support. The affected product was Google Calendar, and users who need assistance can refer to the help article https://support.google.com/a/answer/1047213.