International Mobilization Day against Nuclear War is observed worldwide every January 28, commemorating the anniversary of the adoption of the Delhi Declaration in 1985. This declaration was established during a meeting of Heads of State and Governments from India, Argentina, Greece, Mexico, Tanzania, and Sweden in New Delhi, advocating for an end to the nuclear arms race and the gradual elimination of nuclear arsenals globally. The day serves as a reminder of the historical use of nuclear weapons in 1945 and the ongoing political threats posed by nuclear capabilities. It also highlights significant treaties aimed at nuclear disarmament, including the 1968 Non-Proliferation Treaty, which prohibits nuclear weapons ownership for all countries except five recognized nuclear states. Observances typically focus on promoting peace and disarmament initiatives, drawing attention to the need for continued efforts toward global nuclear disarmament.