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I was missing the moon in the sky so looked up a lunar calendar to find out when it would be visible again. While looking at the calendar for the month of March, I noticed that the moon on the 21st looked split between light and dark. I clicked on it and noticed some interesting numerical data in the phase details. https://www.moongiant.com/phase/3/21/2021
As I’ve been paying attention to this date for other reasons, I found the data provided on the lunar calendar intriguing.