Its not
Shivariti or something
Its Shiva-Ratri ( Ratri : Night). Observed as the night of Shiva. One of the biggest Hindu festivals. Remembering Shiva and chanting prayers, fasting, doing Yoga and meditating.
Devotees of Lord Shiva fast for the whole day and pray for noninjury to others, forgiveness, and the discovery of Shiva.
Om Namah Shivaya (sacred mantra of Shiva).
Its not shivarati or something??? Huh. Wow. I could couldve sworn the official name of the holiday was "shivarati or something". ..My mistake. Thanks for steem-splaining that to me. At least i have the one with Santa Claus right, "chrishmast or whatever."