National Rainbow Baby Day is observed worldwide every August 22 to commemorate children born to families that have previously experienced miscarriage, stillbirth, or infant death. The term "rainbow baby," which symbolizes hope and healing after loss, was first used in 2008 in an essay collection focused on pregnancy complications. The day was founded in 2018 by Alexis Delchiaro of What the Fertility, a charity that supports mothers navigating fertility challenges. Typical customs include sharing personal stories online using the hashtag #NationalRainbowBabyDay, holding memorials for lost children, and donating to pregnancy loss charities. This observance allows parents to reflect on their mixed emotions surrounding the birth of a rainbow baby, acknowledging both their grief and joy.