October 15 Anniversaries

Gregorian Calendar Day (Guregorio-reki Seitei Kinenbi)

World Observances

What Is Gregorian Calendar Day? October 15 is "Gregorian Calendar Day" in Japan....

Global Handwashing Day

World Observances

What Is Global Handwashing Day? October 15th is "Global Handwashing Day." It was...

Mutual Aid Day

Historical Anniversaries

What Is Mutual Aid Day? Every October 15th is "Mutual Aid Day" (たすけあいの日, Tasuke-...

Mushroom Day (Kinoko no Hi)

Food Days

What Is Mushroom Day? October 15 is "Mushroom Day" in Japan. It was established ...

Doll Day

Other

What Is Doll Day? October 15th is "Doll Day" in Japan. It was established in 196...

Fossil Day

Other

What Is Fossil Day? October 15th is "Fossil Day" in Japan, established in 2018 b...