Indra and other gods go to Lord Shiva, then Lord Shankar tests Parvati's love for him and is pleased with Parvati's penance and thus, at an auspicious time and auspicious time, Shiva and Parvati get married. . This is how Kartikeya is born. Kartikeya kills Tarakasura and gives his place to the gods. According to the Puranas, Lord Kartikeya was born on Shashthi Tithi, hence his worship on this day has special significance.