I read somewhere about the cultural implication of summer solstice, although it is not uniform universally. In ancient Greek, the summer solstice to them is the most egalitarian day of the year. According to sources (culturally) on during this day, both slaves and lords celebrate side by side i.e., all forms of the social hierarchy are put to a standstill just to celebrate this new era.
This day was meant to reference the golden age of Kronos when no one had to work (their own culture). Although a certain group of Greeks still follow the 2500-year-old tradition by trekking to the peak of MT. Olympus on the summer solstice. This is in the case of Greek. For other parts of the world, the cultural implications differ, in the sense that every part of the world that experiences winter would always celebrate the end of the winter and the emergence of summer as a sort of climatic relief.
Some people feel that summer brings about a whole new different culture that will be liked by a lot of people. Summer allows people to make plans and make plans happen because they know that they are going to experience some good days.
Some people like the summer because this will enable them to travel to various places in the world. This is the season wherein people may feel the happiest. They know that the sun is shining brightly, and they may be getting the vitamins that they need to feel well throughout the whole season. This may begin to change as the seasons' change.