The term 'Lunar New Year' refers to the celebration of the beginning of a new year in many East Asian countries, such as China, Korea, and Vietnam. It is based on the traditional Chinese lunisolar calendar and usually falls between late January and mid-February. The crossword solution for this term is 'TETS', which is an abbreviation for the Japanese term 'Toshigami Tetsubun', which translates to 'the god of the new year'. This is a reference to the Shinto deity Toshigami, who is believed to bring good luck and fortune to those who celebrate the Lunar New Year.