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In 1994, the UN General Assembly proclaimed 16 September the International Day for the Preservation of the Ozone Layer, commemorating the date of the signing, in 1987, of the Montreal Protocol on Substances that Deplete the Ozone Layer. [3] The closure of the hole in the ozone layer was observed 30 years after the protocol was signed. [4]
April 17 Earth Day: April 22 International Pallas's Cat [45] [46] [47] April 23 World Day for Laboratory Animals: April 24 World Tapir Day [48] [49] [50] April 27 International Hyena Day [51] [52] April 27 Day of Remembrance for all Victims of Chemical Warfare: April 29 Green Up Day: First Saturday of May in Vermont World Tuna Day [53] [54] [55 ...
Earliest day on which Martin Luther King, Jr. Day can fall, while January 21 is the latest; celebrated on the third Monday in January. (United States) (see January 15) Observances based on Christian calendar: *Earliest day on which [[Laetare Sunday]] can fall, while April 4 is the latest; observed on the fourth Sunday of [[Lent]].
Jul. 15—The state's environmental regulator has declared Friday an Ozone Action Day for the Dallas/Fort Worth region including Parker and Palo Pinto counties. It is the second ozone day in a row ...
In Japan, the similarly themed Greenery Day is celebrated on May 4. Pakistan celebrates National Tree Plantation Day annually on August 18. In South Korea, the day is celebrated on April 5 as Singmogil. Bird Day: Commemorative date celebrating birds and their conservation. Multiple countries around the world on varying days of the year.
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The ozone layer visible from space at Earth's horizon as a blue band of afterglow within the bottom of the large bright blue band that is the stratosphere, with a silhouette of a cumulonimbus in the orange afterglow of the troposphere. The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet ...
In 2025, Yom HaShoah will be observed on Thursday, April 24, according to the United States Holocaust Memorial Museum. It starts at nightfall on April 23 and ends at nightfall on April 24, 2025.