<Tr> <Th> Frequency </Th> <Td> Annual </Td> </Tr> <Tr> <Th> Related to </Th> <Td> In honorees: In history and celebrations: Children's Day, Father's Day, Mother's Day, Parents' Day, National Grandparents Day </Td> </Tr> <P> Siblings Day (sometimes called National Siblings Day or National Sibling Day) is a holiday recognized annually in some parts of the United States on April 10, honoring the relationships of siblings . Unlike Mother's Day and Father's Day, it is not federally recognized, though the Siblings Day Foundation is working to change this . Since 1998, the governors of 49 states have officially issued proclamations to recognize Siblings Day in their state . </P> <P> Siblings Day has spread beyond the United States, and has been recognized by media outlets and celebrities in the United Kingdom, Australia, and India . In France, in Portugal, in Spain, and some other European countries, Siblings Day or Brothers and Sisters Day is celebrated on May 31, following the initiative taken by the European Large Families Confederation (ELFAC). </P>

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