Perhaps just for a moment today, completely forget all your worries on the datum and go climb a tree, for today is International Tree Climbing Day! You flâneurs, drifters and urban explorers in your subterranean playgrounds: “liberate the horizontal and integrate the vertical super-surface.” You ramblers, hikers and vagabonds: forget those Norwegian show-offs and make your own DIY pop-up lookout platform. Burn those Winter reserves away and sweat the Spring into action.