For me, the arrival of summer not only means a change of season, it is also a complete change of rhythm. Not only because the heat seems to dry up all my energy and I drag myself from one place to another, but because people in general are more relaxed. There are no more races to and from schools and you can take your time to get ready and for some unknown reason. Knowing you'll soon be on holidays or having just come back from them makes staying up late much easier than during the winter, and having longer days makes you want to take advantage of those extra hours of light.
Summer is also a time to meet up with your friends, and Spain is well known for its bar terraces serving ice-cold beers and tapas. Wherever you go, you'll see tables full of people eating and chatting under the sun umbrellas. In the evenings, you'll still find the tables outside full of people whichever day of the week and often until late hours in the night.
Children will also be allowed to stay up later, but this won't lower their energy levels and you can usually hear their cries and splashes from swimming pools in the vicinity or a beach nearby. Also, there is always the option of the well-known Siesta which will reboot your system ready for more socializing.
I find the bustling of bars and beaches relaxing and watching other people so happy and at ease infects me with the same feelings. You forget that this country is afflicted with the crisis and political corruption by watching people laugh and joke around the table and I'm glad people still know how to enjoy themselves and have fun even under the circumstances and pressure.
What are summers like where you live?