Events in Longleng revolve heavily around the agricultural calendar, religious milestones, and community celebrations.
* **Phom Monyu Festival**: Celebrated annually in early April, this is the premier festival of the Phom tribe. It involves days of community feasting, traditional games, folk dances, and music, drawing people from across the district. * **Moho and Bongvum**: Other traditional Phom festivals celebrated during the year, though Monyu remains the largest. * **Church Centenaries and Jubilees**: Large-scale religious gatherings that bring together thousands of community members from neighboring districts. * **Republic Day and Independence Day**: National holidays are celebrated at the Longleng Local Ground with parades, cultural performances, and speeches by district officials.