normalår
A normalår is a Swedish term referring to a common or ordinary year. In the Gregorian calendar system, which is widely used internationally, a normalår consists of 365 days. This is in contrast to a skottår, which is a leap year and contains 366 days. The extra day in a leap year is added to February, making it 29 days long instead of the usual 28.
The distinction between normalår and skottår is a mechanism to keep the calendar year synchronized with the
Leap years are generally added every four years. However, there are exceptions to this rule: years divisible