People of Hyderabad were in for a pleasant surprise on Wednesday, courtesy of the sun. The city rang in the Telangana Formation Day with a rare atmospheric phenomenon that had most residents staring at the sky, taking in the scenic sight. Citizens were pleasantly surprised to spot a large rainbow-hued halo around the sun in the morning. This unusual optical phenomenon is known as the ‘22 degree circular halo'. Excited residents soon shared images of the stunning view on social media.