Guru Nanak Dev Ji's Joti Jot, meaning "merging into the Eternal Light," commemorates the passing of the first Sikh Guru at Kartarpur on September 22, 1539 . According to the Nanakshahi calendar, the occasion is observed on October 5, 2026 (19 Assu) . The day is marked with Akhand Paths, kirtans, and prayers at gurdwaras, particularly at Gurdwara Darbar Sahib in Kartarpur, his final resting place, where devotees reflect on his timeless teachings of "Ik Onkar" (One God), equality, and selfless service that continue to guide humanity .