The summer solstice is referred to as midsummer most notably in northern Europe such as Sweden, Denmark, Norway, Finland, Estonia, Latvia, Lithuania and many other parts of Europe. Summer, which is the warmest season of the year, comes between spring and autumn. Astronomically, summer occurs in the northern hemisphere early-May, and the end of summer in early-August.
The summer solstice occurs around June 20 -22nd, which is more or less “the middle of summer” astronomically. It marks the midpoint of the season. However, metrological calculations mark summer solstice as “the beginning of summer” as it determines the longest day of the year.