Summer is one out of four seasons of the year which falls between spring and autumn. Its name comes from the Old English word sumor which meant summer. The June Solstice is the longest day of the year and it is the beginning of the astronomical summer. This year in Poland it fell on the 21st of June at 00:34. The time when the Sun is at the northernmost point of the equator is the main factor which influences when the solstice takes place. This year is unique because two important phenomena like June Solstice and a full Moon appeared at the same time. Previously, such a combination occurred in 1967 and we will not be able to observe it again until 2062.