What is an HMO plan? HMO means Health Maintenance Organization. HMO plans offer a wide range of healthcare services through a network of providers who agree to supply services to members. With an HMO you'll likely have coverage for a broader range of preventive healthcare services than you would through another type of plan. How does an HMO plan work? As a member of an HMO, you'll be required to choose a primary care physician (PCP).
The summer solstice in the Northern Hemisphere ranges in date from June 20 to 22. This occurs in part because of the difference between the Gregorian calendar system, which normally has 365 days, and the tropical year (how long it takes Earth to orbit the Sun once), which has about 365.242199 days.
For example, under the definition of astronomical seasons, the June solstice marks the start of summer in the Northern Hemisphere, but it is the start of winter in the Southern Hemisphere. The same rule applies for the other seasons. The meteorological seasons in the Southern Hemisphere are also opposite to those in the Northern Hemisphere: 1  Fall (autumn) - starts March 1 and ends May 31; 2  Winter - starts June 1 and ends August 31; 3  Spring - starts September 1 and ends November 30; and, 4  Summer - starts December 1 and ends February 28 (February 29 in a Leap Year).