Is there a way to add an event from the top panel calendar without opening up the calendar app?

I just want a little “+” button on the top bar calendar so I can add events without having to go into the full calendar.

I think it would be very quick and useful for most people instead of a read-only solution in the top panel.

Does a solution exist for this? How do I go about implementing such a solution if it does not?

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Author: plants