“Rare lunar phenomenon” that happens every couple of years, and is only relevant because there are 27ish days between a new moon and 30-31 days in a month. The moon is cool and I like looking at it, but a “blue moon” is a quirk of our calendar not the moon being interesting.
Even the "supermoon" part is really pretty bland. The Moon looks very slightly larger. Imperceptible without some kind of visual reference that you've calibrated beforehand.
Just look at it through some binoculars and you'll be way more impressed.
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