Peter I issued a decree “On monitoring cleanliness in Moscow and on punishment for throwing litter and any droppings onto the streets and alleys” on April 9, 1699. Failure to comply with the will of the sovereign was punishable by whipping and a large fine. That is why Cleaning Industry Workers Day falls on April 9th.

It is not known exactly who made the decision to celebrate the birthday of laughing gas on April 9. Perhaps the author of this unusual holiday belongs to a dentist or other doctor, or maybe just a joker. It is not widely known; only people involved in medicine know about the date. Therefore, there are no established celebration traditions.

Every year Finns and Finnish language lovers celebrate Finnish Language Day on the 9th of April. If you hear that Mikael Agricola Day is also celebrated in Finland on this day, then you should not correct your opponent. These two holidays are identical, the only difference is in the years of their occurrence.

Georgia is considered a country that is famous for its multinationality. The traditions and culture of the people of Georgia are widely diverse. National Unity Day is considered an important date. On April 9, 1989, in the capital of Georgia, events of historical importance took place. In 1989, open-ended rallies were actively held with the aim of restoring Georgia's independence.

Baha'i Holidays - Feast of the Nineteenth Day of the Month of Jalal

The Matryona holiday is named in honor of Saint Matrona of Thessalonica, a martyr who suffered for her faith in Christ in the 3rd-4th century. Saint Matrona was the patroness of housewives. In the morning they went to the temple and lit a candle for her. They prayed to the saint for help in coping with the abundance of household chores. At Matryona Nastovitsa, the peasants looked out for the return of the lapwings from the warm lands. Returning to their native places, lapwings brought warmth with them.

Tunisia Holidays - Martyrs Day

Vasanta Navratri - spring nine nights of the Mother Goddess in Hinduism (Vaisakhi)

Orthodox holidays on April 9:

Memorial Day of the Martyr Matrona of Solunskaya