The day aims to raise awareness against speciesism, the belief that one species is superior to others.
The term "speciesism" was coined by Richard D. Ryder and was later popularized by Peter Singer through his book Animal Liberation.
The day promotes the idea that animals should receive equal moral consideration and should not be discriminated against based on their species.
It is supported by organizations such as PETA and FARM (Farm Animal Rights Movement).
The observance encourages discussions on animal welfare, ethical treatment of animals, sustainable lifestyles, and reducing animal exploitation in food, clothing, entertainment, and research.