🌐EnglishEnglishBahasa IndonesiaEspañolFrançaisItalianoPolskiTiếng ViệtРусскийالعربيةفارسی한국어中文日本語EntityQ268458· pop 25· linked from 22 articlesMole DayAlso known as 1023unofficial commemoration of the Avogadro constantAvailable in 25 languagesEspañolFrançais中文日本語РусскийItalianoالعربيةArmenianAssameseBahasa IndonesiaBanglaConnectionschemistryEntityInternational System of UnitsEntityCategoriesChemistry eventsInfobox holiday fixed dayObservances about scienceOctober observancesUnofficial observances