On October 23, several holidays and historical events are observed around the world. This was reported by Qazaqyia.kz citing Sputnik Kazakhstan.

Mole Day

Since October 23, 1991, from 6:02 a.m. to 6:02 p.m., chemists celebrate Mole Day, a holiday dedicated to the unit of measurement of the amount of substance in the International System of Units. The idea for this event first appeared in the 1980s in The Science Teacher newspaper. On May 15, 1991, M. Oiler, a chemistry teacher from Prairie du Chien (Wisconsin), founded the National Mole Day Foundation based on this idea. Later, chemists decided to celebrate such a holiday. When choosing the date, they rely on Avogadro's number — 6.02x10^23. The digits indicate the date and time of the holiday.

Professional holiday of advertising workers

In Russia, advertising workers are congratulated today on their professional holiday. The history of this holiday begins in 1994. Since then, the concept of "advertising" has appeared in our consciousness; before that, few knew about such professions as PR manager, marketer, and creative employee.

International Snow Leopard Day

On October 23, countries where the snow leopard lives celebrate International Snow Leopard Day. This holiday was adopted in 2013 at the World Forum on Snow Leopard Conservation held in Bishkek, the capital of Kyrgyzstan. The founders of the holiday aim to draw public attention to the protection of the snow leopard and the problems of its habitats.

Historical events in the world

On October 23, the following historical events took place in the world:

  • 01in 1814, the first plastic surgery was performed in Europe;
  • 02in 1914, the Shchukin Theater School opened in Moscow;
  • 03in 1985, a rock laboratory was established in Moscow;
  • 04in 1990, the city of Gorky was renamed Nizhny Novgorod.

Historical events in Kazakhstan

On October 23, the following historical events took place in Kazakhstan:

  • 01in 1961, the settlement of Yermak was transformed into the city of Yermak (now the city of Aksu in Pavlodar Region);
  • 02in 1992, the Concept of Military Doctrine and Military Construction of Kazakhstan was adopted;
  • 03in 2003, the Congress of World and Traditional Religions began in Astana.

Famous people born in the world

On October 23, the following famous people were born in the world:

  • 01in 1920, famous Italian children's writer and journalist Gianni Rodari was born;
  • 02in 1932, Russian writer Vasily Belov, one of the major representatives of "village prose", was born;
  • 03in 1940, Brazilian footballer and forward Pelé was born;
  • 04in 1986, British actress Emilia Clarke (films: "Game of Thrones", "Terminator Genisys") was born.

Famous people born in Kazakhstan

On October 23, the following people were born in Kazakhstan:

  • 01in 1929, scientist, professor, academician of the National Academy of Sciences of Kazakhstan, laureate of the Sh. Ualikhanov Prize of the Academy of Sciences of Kazakhstan Serik Mukhamedzhanov was born;
  • 02in 1950, chief researcher at the Institute of History and Ethnology of the Academy of Sciences of Kazakhstan Zhuldyzbek Abylkhozhin was born.