Summer Solstice = Walk to home from work day
Take advantage of the day with the most sunlight, Summer Solstice on June 21.
Some suggestions:
Pull an all-nighter: I once did this when I locked myself out of my apartment on Summer Solstice a couple years ago. It was around midnight, so I felt bad calling my sister or my landlord who have the keys. I walked down to the 24-hour Golden Nugget and hung out until 7pm. It was interesting walking around and seeing all the activity going on late at night. Other people must have been celebrating the night as well.
Walk home from work: Now this I can see being a National Holiday. Can you imagine a day where nobody drives to work. Nobody takes the train. Nobody bikes. Just everyone walking. Wow! I live 6.8 miles from work. That's totally doable. Maybe I'll do a photo sequence of my walk. Yay! New traditions!