September 10 – Yenya, the biggest festival of Kathmandu Valley dedicated to god of rain Indra, formally has commenced on this morning with the erection of a sacred wooden pole (Yasin) at Hanumandhoka in Basantapur Darbar Square. The erection of Yasin took place at the auspicious time of 9:17 am morning.
The festival lasts for eight days with singing, mask dancing and rejoicing along with other rituals.
Legends said that the Indra Jatra festival is observed to celebrate the victory of the gods over the demons to release Jayanta, the son of Lord Indra.
Indra, the god of rain, is worshiped in this festival primarily celebrated by the Newar communities following both Hinduism and Buddhism.