What is the 'April Cool' campaign?

A campaign to make it ‘April Cool’ instead of ‘April fool’ this year has been doing rounds on social media recently. Netizens sharing the posts regarding making it ‘April cool’ this time by planting trees instead of April fool on 1st April is doing rounds on the internet.Clean and Green Pakistan's official account, Prime Minister Imran Khan's movement for nationwide cleanliness and tree plantation, has also come up with the idea of making it  shared a post regarding this positive message. PM Imran launched  ‘Clean and Green Pakistan’ movement in September 2, 2018, to tackle pollution and global warming in Pakistan. 

source https://www.thenews.com.pk/latest/452030-april-cool-instead-of-april-fool