Webit’s easy to forget that the first day of summer 2018 is actually a cosmic event. Here’s what you need to know: When is the 2018 summer solstice? Webdespite sounding a bit mad, this is actually true! Various areas in and around the arctic circle actually see 24 hours of daylight during periods of the summer, including sections. Webduring the summer solstice in the northern hemisphere, this tilt positions us to receive the most direct sunlight, leading to longer days and warmer temperatures.