World Hydrography Day is observed on June 21 every year to raise awareness about hydrography and the essential role that it plays in improved knowledge of the seas and oceans.
Theme 2021: One hundred years of international cooperation in hydrography
Theme 2022: Hydrography - contributing to the United Nations Ocean Decade
World Hydrography Day is observed on June 21 every year to raise awareness about hydrography and the essential role that it plays in improved knowledge of the seas and oceans.
Theme 2021: One hundred years of international cooperation in hydrography
Theme 2022: Hydrography - contributing to the United Nations Ocean Decade
International Day of Clean Air for blue skies, was designated 7 September by the United Nations General Assembly in 2019.
The United Nations General Assembly designated 7 September as the International Day of Clean Air for Blue Skies with the aim of raising awareness and promoting actions to improve air quality.
International Day of Clean Air for blue skies, was designated 7 September by the United Nations General Assembly in 2019.
The United Nations General Assembly designated 7 September as the International Day of Clean Air for Blue Skies with the aim of raising awareness and promoting actions to improve air quality.
International Day of Clean Air for blue skies, was designated 7 September by the United Nations General Assembly in 2019.
The United Nations General Assembly designated 7 September as the International Day of Clean Air for Blue Skies with the aim of raising awareness and promoting actions to improve air quality.
The United Nations General Assembly designated 7 September as the International Day of Clean Air for Blue Skies with the aim of raising awareness and promoting actions to improve air quality.