|Observed by||Several countries|
|Significance||Honoring relationships of siblings|
|Next time||10 April 2018|
|Related to||In honorees: Raksha Bandhan
In history and celebrations: Children's Day, International Men's Day, International Women's Day, Father's Day, Mother's Day, Parents' Day
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.
The US holiday was originally conceived by Claudia Evart to honor the memory of her brother and sister, both of whom died at early ages. The Siblings Day Foundation was incorporated in 1997 and achieved non-profit status in 1999.
Carolyn Maloney, then the U.S. Representative for New York's 14th congressional district, officially saluted the holiday and introduced it into the official Congressional Record of the United States Congress on September 26, 2005.
Examples of commemoration during this observance include giving your sibling a gift (including a surprise gift), a giftcard, and taking one out for dinner. Nonmaterial examples of observances during this day includes giving hugs to your sibling(s), enjoying time with them, and honoring their presence in your life. 
- "National Sibling Day – Highlight: ARISE Sibshops for Children". Oswego County Today. March 22, 2013. Retrieved March 22, 2013.
- "Siblings Day Foundation". Retrieved March 2, 2013.
- "Gubernatorial (State) Proclamations". Retrieved September 26, 2013.
- Kapur, Arjun-Anshula (April 12, 2015). "Bollywood celebrates siblings day". The Times of India. Retrieved April 12, 2015.
- Dixit, Marni (April 11, 2015). "Sister act! Rhiannon Fish joins National Siblings Day celebration by posting throwback snaps of her and sister Miranda in adorable animal-print outfits". Daily Mail Australia. Retrieved April 12, 2015.
- Spiegel, Debbi (March 22, 2013). "Celebrate National Siblings Day!". Retrieved March 22, 2013.
- "Siblings Day Foundation". Retrieved April 10, 2013.
- Maloney, Carolyn B. (March 22, 2005). "Congressional Record - Extenions of Remarks" (PDF). In Honor of Siblings Day. Retrieved March 22, 2013.
- "About 80 percent of Americans have at least one sibling...". Chicago Tribune.
- Twelve Principles of the Gilded Nest: Designing for the Soul of the Home, p 97, 2002
- The Oamaru Telegram Issue 192:
- Chases Calendar of Events, 2012 Edition, McGraw Hill Professional