National Mother-in-Law Day in USA
National Mother-in-Law Day in USA is held on October 22. Celebrated on the fourth Sunday in October. This event in the third decade of the month October is annual. 
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Modeled on the celebration of Mother's Day and Father's Day, Mother-in-Law's Day was first celebrated on March 5, 1934, in Amarillo, Texas, where it was initiated by the editor of the local newspaper. The observance was later moved to the fourth Sunday in October.
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