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.
date - the particular day, month, or year (usually according to the Gregorian calendar) that an event occurred; he tried to memorizes all the dates for his history class. twelvemonth, year, yr - a period of time containing 365 (or 366) days; she is 4 years old; in the year 1920.