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.
DEFINITION of 'Calendar Year'. The one-year period that begins on January 1 and ends on December 31, based on the commonly used Gregorian calendar.For individual and corporate taxation purposes, a calendar year will generally comprise all of the year's financial information used to calculate income tax payable.Next Up.he one-year period that begins on January 1 and ends on December 31, based on the commonly used Gregorian calendar.