Thaipusam or Thaipoosam (Tamil: தைப்பூசம், Taippūcam), is a festival celebrated by the Tamil Hindu community on the full moon in the Tamil month of Thai (January/February), usually coinciding with Pushya star, known as Poosam in Tamil
The word Thaipusam is a combination of the name of the month, Thai, and the name of a star, Pusam (Tamil word for Pushya). This particular star is at its highest point during the festival. The festival commemorates the occasion when Parvati gave Murugan (aka Kartikeya) a Vel "spear" so he could vanquish the evil demon Soorapadman and his brothers.