December 21 Anniversaries

Basketball Day (Basuketto Bōru no Hi)

World Observances

What Is Basketball Day? December 21st is "Basketball Day," promoted in Japan by ...

Crossword Puzzle Day

World Observances

What Is Crossword Puzzle Day? December 21 is "Crossword Puzzle Day." It commemor...

Tsukemono (Japanese Pickles) Day

Food Days

What Is Tsukemono Day? The 21st of every month is "Tsukemono Day," Japanese Pick...

XXIO Day

Industry Days

What Is XXIO Day? The 21st of every month is "XXIO Day" in Japan. It was establi...

Palindrome Day

Wordplay Anniversaries

What Is Palindrome Day? December 21 is "Palindrome Day" in Japan. Written as 122...

Osame no Daishi -- the Year's Last Kobo Daishi Fair

Seasonal Events

What Is Osame no Daishi? December 21 is "Osame no Daishi," the last ennichi -- t...

Long-Distance Relationship Day (Enkyori Renai no Hi)

Other

What Is Long-Distance Relationship Day? December 21st is "Long-Distance Relation...