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Since it started in 2002, this is the first Cirno Day to have three identical numbers in its year (three 2s: 2022). This will not happen again until 2122.
This is the first Cirno Day since 2014 to happen at the same time as a full moon (the apex occurs at 9:59 PM on Howland Island and Baker Island). There will not be another full moon on Cirno Day again until 2033.
