Celebrated this year during May 6 - 12, this week (apparently the oldest of its kind in the United States) was first observed in 1915 and was established by Dr. William O. Stillman, leader of the American Humane Association at the time.
Admittedly, my first thought upon seeing this on my calendar was, "what, only one lousy week?", but I suppose that even just officially recognizing the notion of kindness towards other sentient beings can't hurt. But as vegans know, we should extend compassion to all others all the time, and one very simple but powerful way to do that is by not eating them. This one act of kindness alone, if practiced by enough people, could do wonders.
“We know we cannot be kind to animals until we stop exploiting them -- exploiting animals in the name of science, exploiting animals in the name of sport, exploiting animals in the name of fashion, and yes, exploiting animals in the name of food.” ― César Chávez