They developed independently of each other. There are smaller calendars out there as well. Of course, for business purposes we follow the Western one for convenience.
Theoretically, perhaps. But I was merely talking about scheduling them. If they exist at all, they have to be scheduled. In any case, are you sure they're as private as you think, Euri?
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At the very least it would be difficult to schedule meetings.
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[They are spontaneous!]
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