Today is Earth Day
Also:
Take Our Daughters And Sons To Work Day© (We have had some helpers in the library)
A holiday in Iceland: Sumardagurinn Fyrsti (The First Day of Summer). It's a Viking thing.
See R 394.26 Chases's Calendar of Events
and R 394.26 The International Book of Days
And what is the earth doing today?
Volcanoes Dewey: 551.21 | maps
Earthquakes Dewey: 551.22 | maps