Looking at the Data from 2024 (I don't see the 2025 data) it's hard for me to see how they combine to form a metric for happiness, but it's interesting still. I spent 3 summer months in Helsinki doing a research internship at Aalto University. Those three summer months were some of the most fun I've ever had, but on last day I was there, a friend of mine who was local, pointed around the bar we were in and said, "Look around, you can see the depression setting in" in prelude to the fast approaching winter months. It always surprises me to see Finland hit the top of these happiness reports because he really made it seem like winters were grimmmmmm.