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The day or two during which the moon is invisible at the end of the month.
"Surar" or "sirār" (moonless night) is the last night of the month. If the month consists of twenty-nine days, then its "sirār" is the twenty-eighth night. If the month is thirty days long, then its "sirār" is the twenty-ninth night.
"Surar": the night during which the moon is invisible. Original meaning: disappearance, invisibility.
One or two nights at the end of a lunar month. They are given this name because the moon is invisible in these nights. The term is also said to refer to the beginning or the middle of a lunar month.