Can Google Calendar sync with arbitrary (native) services?

Question

excel

The very theoretical possibility of such an interaction is of interest.
Those. prepare events in some format (and then change them) and so that the google calendar is synchronized and updated data.
Directly creating events and then keeping them up to date in the google calendar via the API is understandable, but inconvenient - therefore, any alternative methods are of interest.
Maybe there are some regular tools? So far, all that has been found is the import of static ical calendars - but this is not at all the same.

Answer 1

Found a solution. For each sheet, you need to create a macro:

Private Sub Worksheet_Activate()

ActiveSheet.AutoFilter.ApplyFilter

End Sub

Answer 2

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Link How to hide multiple rows in excel if their cells are either empty or =""?
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Answer 3

Voice input from android