The External Calendar is updated immediately upon changes made to your calendar. However, each calendar application has its re-sync rates, which can cause delays in the appearance of changes. Google Calendar can take up to 12 hours to update synched calendars. Google states: "It might take up to 12 hours for changes to show in your Google Calendar." [source]
The External Calendar is updated immediately upon changes made to your calendar. However, each calendar application has its re-sync rates, which can cause delays in the appearance of changes. Google Calendar can take up to 12 hours to update synched calendars. Google states: "It might take up to 12 hours for changes to show in your Google Calendar." [source]
The External Calendar is updated immediately upon changes made to your calendar. However, each calendar application has its re-sync rates, which can cause delays in the appearance of changes. Google Calendar can take up to 12 hours to update synched calendars. Google states: "It might take up to 12 hours for changes to show in your Google Calendar." [source]