World Pulmonary Hypertension Day (WPHD) is observed worldwide every May 5 to raise awareness of pulmonary hypertension (PH), a serious health condition that affects the lungs and heart. Established during a scientific symposium in Madrid in 2012, the day commemorates the anniversary of the first death of a child from PH in Spain, linked to toxic oil syndrome. The event is spearheaded by PHA Europe and supported by over 80 organizations globally, focusing on promoting early diagnosis, access to treatment, and funding for PH research. Common symptoms of PH include shortness of breath, chest pain, and fatigue, often leading to misdiagnosis. Individuals are encouraged to engage by learning about PH, sharing information, and using hashtags like #WorldPulmonaryHypertensionDay on social media.