May 10·Every year

World Migratory Bird Day

UN-backed awareness day highlighting the need to protect migratory birds and their habitats. Observed twice yearly (May and October) along the major flyways.

Category: Animal
Observed in: KenyaNetherlandsUnited StatesIndiaAustralia

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Also on this day

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Notable · 2017

Syrian civil war: The Syrian Democratic Forces, assisted by the U.S. military, captured the Tabqa Dam and surrounding countryside, completing the Battle of Tabqa.

2024Start of the May 2024 solar storms, the most powerful set of geomagnetic storms since the 2003 Halloween solar storms.
2022Queen Elizabeth II misses the State Opening of Parliament for the first time in 59 years. It was the first time that a new session of Parliament was opened by the Prince of Wales and the Duke of Cambridge acting as Counsellors of State.
2017Syrian civil war: The Syrian Democratic Forces (SDF) capture the last footholds of the Islamic State of Iraq and the Levant (ISIL) in Al-Tabqah, bringing the Battle of Tabqa to an end.