A sister is the best gift your parents could ever give you... even if you sometimes wish they'd returned it or exchanged it for a puppy. Sisters get the jokes, share the secrets, and annoy you on a daily basis, but when push comes to shove (sometimes literally), they'll be right there to back you up. To celebrate your relationship and your mutual crazy sense of humor, post one of these hilarious Instagram captions for National Sister's Day (and don't forget to tag your partner-in-crime).
National Sister's Day is the first Sunday in August, according to National Day Calendar. For 2019, that means August 4 is the day to show your sister some love (or to have that love shown to you). Oddly, there doesn't seem to be a reliable source for the origins of the day, although Heavy noted that searches for National Sister's Day spiked in 2012. Could it be that some enterprising sisters decided to try creating a holiday for themselves by drumming up some social-media interest? No matter. However it began, National Sister's Day deserves to take its place alongside Mother's Day, Father's Day, Grandparents Day, and Siblings Day as a 24-hour period to give thanks for the special female sibs in your life, be they older, younger, or your twin or triplets.
These are 17 of the funniest sister-related captions out there. If you're quick, you can get your post up before your sisters do, and then you can do a little Superior Dance for being the first, nyah nyah nyah.