Cleaning Day in Japan
Cleaning Day in Japan is held on September 29. Kuriningu No Hi. This event in the third decade of the month September is annual. 
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We’re grateful this only comes around once a year. Reading 9 (ku), 2 (ri-ni) and 9 (ku) apparently puts together kuriningu. The best what can happen on this day is to get a discount at your local dry cleaning store. You can go back on March 9 and thank them.
Similar holidays and events, festivals and interesting facts
Mid-Autumn Festival or Moon Festival or Mooncake Festival on September 25 (15th day, 8th Chinese lunar month);
10-yen Curry Day in Japan on September 25 (Juen Kare No Hi);
National Coffee Day in Japan and Sri Lanka on October 1
Seasonal Change of Clothing in Japan on October 1 (Koromogae);
Mitsubishi UFJ Financial Day on October 1
Mame shiba Day in Japan on October 2
KDDI Corporation Day on October 2 (Asking ourselves if our motives are righteous or selfish);
Tofu Day in Japan on October 2 (Tofu No Hi)
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