The anniversary of the Port of Beirut explosion is observed annually on August 4 in Lebanon as a national day of mourning. This day pays tribute to the victims of the 2020 explosion, which resulted in over 200 fatalities, more than 7,000 injuries, and left approximately 300,000 people homeless. The explosion was linked to the improper storage of 2,750 tonnes of ammonium nitrate, which had been kept in a warehouse since 2014 after being confiscated from the cargo ship MV Rhosus. On the first anniversary, a memorial event was held at the Port of Beirut, attended by government officials and representatives from the United Nations and the International Labor Organization. Due to the significance of the day, government offices, schools, and banks are closed. The event serves as a reminder of the tragedy and the ongoing investigation into its causes.