Given the task definition and input, reply with output. In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

World Environment Day ( WED ) is celebrated on the 5th of June every year , and is the United Nation 's principal vehicle for encouraging awareness and action for the protection of our environment .
World Environment Day ( WED ) is celebrated every year on June 5 .