What is the interpretation of verse 39 from Surah Yasin: "And the moon – We have ordained for it phases until it returns like the old date-stalk"?

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The interpretation of the thirty-ninth verse of Surat Yasin, "And the moon – We have appointed for it stations until it returns like the old curved date stalk," means that Allah made the moon move through specific stations, by which the passage of months is indicated, just as the sun indicates night and day. At the beginning of the month, it is dim, and its light gradually increases until it becomes full on the fourteenth night. Then, it decreases until, at the end of the month, it returns "like the old curved date stalk," meaning like the dried, bent base of a date cluster. This is a rhetorical simile describing the shape of the moon at the end of the month.