The moon partially covers the sun during a solar eclipse seen from Gaza City in the Middle East on March 29, 2006. Around 2 minutes of darkness in late morning on Monday, Aug. 21, 2017, will present Oregon tourism with perhaps its biggest international travel marketing opportunity ever, especially to visitors from Asia.
Definition of calendar year. 1 : a period of a year beginning and ending with the dates that are conventionally accepted as marking the beginning and end of a numbered year. 2 : a period of time equal in length to that of the year in the calendar conventionally in use.
Calendars are normally based on astronomical events, and the two most important astronomical objects are the sun and the moon. Their cycles are very important in the construction and understanding of calendars. Our concept of a year is based on the earthâs motion around the sun. The time from one fixed point, such as a solstice or equinox, to the next is called a tropical year. Its length is currently 365.242190 days, but it varies.