National Mole Day is celebrated on October 23 each year, from 6:02 a.m. to 6:02 p.m. This day honors the scientific concept of the mole, a fundamental unit in chemistry that represents 6.02 x 10²³ particles, such as atoms or molecules. The celebration aims to promote interest in chemistry and to recognize the importance of this unit in understanding chemical reactions and calculations. The day was first established in 1991 by a group of chemistry teachers and is often marked by various educational activities, experiments, and discussions about chemistry. Schools and institutions may host events that include games, quizzes, and demonstrations related to the mole and its significance in the field of science.