Thaipusam, also known as Thaipoosam, is a Hindu Tamil festival that is observed on the first full moon day of the Thai month, which falls on the Pusam star. The celebration honours the victory of the Hindu god Murugan—armed with a vel, a heavenly spear bestowed by Parvati—over the demon Surapadman. Many attendees pierce their skin, tongues, or cheeks as part of the festival's rituals, which involve various acts of devotion and mastery over their senses. Some people cross blazing coals. Through such deeds, devotees want to atone for their sins and reinforce their Hindu faith.