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There are 88 constellations that are recognized in the sky. In 1928, the number was established by the International Astronomical Union.
It was created in 1934. It was a merger of the International Telegraph Union and the International Radiotelegraph Union.
There are 11 federally recognized national holidays and, in addition, some states also declare particular dates to be state holidays. However, whether or not your employer gives them to you is entirely up to them, and/or may be controlled by a union agreement or work contract. There is no law that REQUIRES an employer to give you time off.
By 1924, the new Soviet Union had been recognized by all the major world powers. Only the US, remained as a hold out.
International Astronomical Union was created in 1919.
Union of International Associations was created in 1907.
International Democrat Union was created in 1983.
International Seamen's Union ended in 1937.
International Seamen's Union was created in 1892.
International Gas Union was created in 1931.
International Typographical Union ended in 1986.
International Philatelic Union was created in 1881.