The 1200s BC is a decade that lasted from 1209 BC to 1200 BC.
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The last day of the Festival of Ridván (Baháʼí Faith) (this date is non-Gregorian and may change according to the March equinox
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Twelve-day festival in the Baháʼí Faith


International Workers’ Day or Labour Day (International)
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May 1 celebration of the roles of law in the United States
May Day (beginning of Summer) observances in the Northern hemisphere (see April 30): Calan Mai (Wales)
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Traditional Welsh festival

May Day (beginning of Summer) observances in the Northern hemisphere (see April 30): Beltane (Gaelic)
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Gaelic May Day festival



Day of Remembrance for all Victims of Chemical Warfare (United Nations)
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Annual commemorative event