I saw three seasons in a single day at Yosemite National Park

I am one among many people who visited Yosemite National Park this year who got to see three seasons in a single day.
It was sunny to begin with and started snowing by mid day. I could feel the warmth of fall/spring towards the end of the day. My parents came to USA for the first time, and they really enjoyed this day at Yosemite.
I hope pictures explains it all.