Thaipusam or Thaipoosam (Tamil: Taippūcam, IPA: [t̪əjppuːsəm]) is a Tamil Hindu festival celebrated on the first full moon day of the Tamil month of Thai coinciding with Pusam star. The festival is celebrated to commemorate the victory of Hindu god Murugan over the demon Surapadman. During the battle, Murugan is believed to have wielded a vel, a divine spear granted by his mother, Parvati.