The Manirimdu festival takes 3 days beginning on full moon day in October which is held once a year at the Thyengboche Monastery.

Mani Rimdu, a very important festival to the Sherpas, falls on the full moon day of Tibetan ninenth month (October/November/December). The three day celebrations of Mani Rimdu follow the ten-day non-stop prayer sessions addressed to the parton deities - seeking " blessing for the good of all mainkind". The portagoniest of all is Guru Rimpoche, the founder of Vajrayan Buddism in Tibet. Masked Lamas of Khumbu region perform various religious rituals amidts dancing and singing.