The first Earth Day was celebrated on April 22, 1970. Earth Day originated in the US but became recognized worldwide by 1990.

More Earth Day Fun Facts here!

It takes three years to grow asparagus from seed to harvest. Once they get going, asparagus plants can be cropped each spring for 15 years or more, but
  the spears start out the diameter of pencil lead in year one. The mini-spears eventually grow into a ferny, waist-high canopy which feeds the underground rhizomes with energy synthesized from the sun. The plants gain strength in year two and by the following spring, some of the spears are reaching the full diameter of a pencil, signaling they're ready to harvest.

The saying, "No spring chicken" originated from New England before raising chickens had become the sophisticated industry it is today.  Chickens came from free-range farms with no incubators or warm hen houses, which meant baby chicks couldn't be hatched or raised in the winter. The prime price for chickens sold during the summer was for those born the previous spring.  Anything older and less succulent that was pawned off as part of the spring crop was quickly identified by shrewd shoppers as "no spring chicken," or, not as young as what was being presented.