Sithi Nakha is one of the important festivals in the Newar community which is celebrated every year on the sixth day of the bright fortnight of Jestha. This year it is on Thursday 15th Jestha, 2077 BS or 28th May 2020 AD. Sithi Nakha marks the first rain of the season before the full monsoon torrents begin to fall hence ending the dry season. It also marks the birthday of Kumar Kartikeya, the elder son of Shiva and Parvati, and the archetypal "rain baby" for the Nepalese people. The festival is celebrated in honor of Kumar, hence this day is also known as Kumar Shasthi. People worship the Pikhalakhu (a place outside the household) by drawing Mandap resembling Kumar.
Sithi Nakha also marks the end of the seven-week Dewali Puja (Digu Puja) period, during which people worship their family deity 'Digu Dya' on their particular day. By the day of Sithi Nakha, the Newar people must complete Dewali Puja. The Dewali Puja is of special significance as the newly married daughters-in-law are welcomed in the family. The Dewali Puja also includes an event of going to the open field for worshiping the family deity, where it is located in an aboriginal condition. Besides, the family members sit together and have a ritual feast.