What does "blue moon" mean and what does it describe?

1. When there are four full moons in a quarter, the third full moon is called the blue moon. The new moon refers to the time between two full moons, which is about 29.53 days. According to the Gregorian calendar, the big month is 3 1 day and the small month is 30 days. The time difference between calendars provides conditions for four full moons in the Gregorian calendar quarter. Astronomers have given it a mysterious and romantic name "Blue Moon" because it only appears once every two or three years.

2. Blue Moon, the leading brand in China laundry detergent market, ranked first in the laundry detergent market for five consecutive years, with a market share as high as 44%. Guangzhou Blue Moon Industrial Co., Ltd., founded on 200 1, is a wholly foreign-owned enterprise owned by Hong Kong Blue Moon International Group Co., Ltd., which owns three series of personal care, clothing care and home care, among which Blue Moon laundry detergent, hand sanitizer, toilet cleaner and floor cleaner have the first market share in China.

3. The clue in The Smurfs (20 1 1+0) is "Blue Moon". The cartoon Smurfs was created by Belgian cartoonist Peyo and his wife * * * in 1958. 198 1 year, NBC purchased the copyright, produced and played the American version of Smurfs comics.

4. ATV "Blue Moon", Manchester City team and city sisters sing songs.