Why does spring make me so happy?

Related questions

1. What happens in the spring?
2. How long does spring last?
3. Is spring a MVC?
4. Why spring is so popular?
5. What is difference between spring boot and spring?
6. Why do we feel sleepy in spring?
7. How does Spring autoconfiguration work?
8. Should I learn Spring?
9. Will spring ever come 2019?
10. What is the advantage of spring boot over spring?

Tags

1. #levels
2. #triggers
3. #release
4. #increased
5. #light
6. #melatonin
7. #brain
8. #helps
9. #sleepy
10. #outside
11. #serotonin
12. #happier
13. #cause
14. #chemical