National Chemistry Week

National Chemistry Week, also known as National Chemistry Day and NCW, is observed next on Sunday, October 19th, 2025. It was observed on November 6th in 1987. It was observed for 7 days starting on October 29th in 1989. It was observed the first full week of November in 1991. It was observed the first full week of November from 1993 until 2001. It has been observed the week of October 22nd since 2002.

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