How do you calculate the start of a new month? (poll 11896363)

How do you calculate the start of a new month?

When the Hellel II calendar says it's a new month

By looking at the calendar on the wall (Gregorian)

With the sighting of the first sliver after the new moon

When the last sliver of the waning crescent is no longer visible

What are you talking about?

Other:

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