One thing we've also done is gotten on the metric train. (Which the US official adopted by act of Congress in 1975) It's part of going native.
But mostly, it's the sequential chain of yellow circles which contributed to a brightened mood. It's nice to see some sun around here. We went for a long walk in today's cold but sunny day and it's a nice payoff for forgetting what sunlight looked like in December. Six months of it. Nice.