World Humanist Day is the annual observance of the organised humanist movement, kept on the June solstice (around 21 June) as a day to state what humanism is and to draw attention to the situation of the non-religious. Humanism is a life-stance affirming that human beings can live ethical and meaningful lives without religion, grounding morality in reason, evidence and shared human concern rather than in divine command. Member organisations of Humanists International mark the day with public events, lectures, statements and shared meals, and use it to promote humanist values and to advocate for freedom of belief and against discrimination.
The choice of the solstice is deliberate and, in the movement's own framing, unsentimental: it is a date fixed by the motion of the earth around the sun rather than by any revelation, founder or sacred event, and so is held to belong to everyone equally, without privileging any tradition. The day was adopted in the 1980s by the American Humanist Association and taken up internationally. As a young and lightly structured observance without prescribed ritual, World Humanist Day reflects the character of the movement it belongs to: it is less a festival than an occasion for public affirmation and advocacy, deliberately anchored to a natural rather than a supernatural event.