What is the Certified Pool/Spa OperatorÂ® Certification Program? A CPOÂ® Certification provides individuals with the basic knowledge, techniques, and skills of pool and spa operations. This training has helped protect millions of swimmers by reducing hazards at aquatic facilities.
A year is the orbital period of the Earth moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by changes in weather, the hours of daylight, and, consequently, vegetation and soil fertility.
âº a period of 365 or 366 days, starting on 1 January and ending on 31 December. (Definition of âcalendar yearâ from the Cambridge Advanced Learnerâs Dictionary & Thesaurus Â© Cambridge University Press)