en
National Siblings Day
/ˌnæʃ.ən.əl ˈsɪb.lɪŋz ˌdeɪ/
Definition
1
An annual observance held on April 10 to celebrate and honor siblings and the special relationships between brothers and sisters.
2
Founded in 1995 by Claudia Evart in memory of her late siblings, it promotes family bonds and appreciation for one's brothers and sisters.
Examples
On National Siblings Day, I gifted my brother a 'World's Okayest Brother' mug, because honesty is the best policy.
National Siblings Day photos flooded my feed, proving that bad haircuts run in the family.
Celebrating National Siblings Day by finally admitting my sister was right about that one time—in 2007.
National Siblings Day: the official excuse to raid your sibling's fridge without repercussions.