As for the US, I think that either Arizona or Indiana, or both, never adopted daylight savings time. Odd.
Arizona does not observe DST. However, the Navajo Nation in the northeastern part of the state (Four Corners area) does. So confusing!
Before we moved to New Mexico, we came out and explored the area, driving from NM to CA and back. On the return trip, we passed through Navajo Country. If I wasn't confused by Arizona's lack of DST observance, it was even more baffling to drive through this section of the state that does. Between the car clock, my watch, my wife's watch and the radio, I think we had three or four options at any given time. It really makes you realize how arbitrary organized time is.
Spring for us is so many things:
Camping time! We love to camp as a family, especially now that we have 20 acres and tens of thousands of forest land to explore. We get out as early as we can in the spring to get our fill. First time we went this year, we woke up to snow, but that just adds a little excitement.
Allergies. Someone mentioned this. I am deathly allergic to Mulberry, which Albuquerque has in large, terrifying numbers. I also get some ash and juniper symptoms, but (knock on wood) the juniper has not given me problems yet this year. I'm just SO thankful that Allegra is now over-the-counter - its m y lifeline to survival for all of April and some of May.
Yard work and vegetable gardening. We have a small yard, so this isn't a lot of work and is quite enjoyable. But this year, I have a lot of work to deal with as the irrigation system ruptured during a cold snap in February.
Lastly, Spring is the brief window to build things out in the yard. Too much later and its just too darn hot to work except in the AM and evening. Currently, I am building an outhouse for our property out of shipping pallets. Its a modular setup and the pieces will be transported and assembled on site.