The answer to your question has to do with the moon's motion around the Earth. Earth spins on its axis every twenty-four hours. Meanwhile, the moon revolves around the Earth once every twenty-eight days. As a result, the moon takes about fifty more minutes each day to line up with any fixed point on Earth. Since tides are due to the pulling of Earth's oceanic waters by the moon's gravitational pull, tides also occur about fifty minutes later each day.
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