It is an occasion when a bunch of basically stupid and useless folks can strut about and pretend to be morally superior to the rest of us. Actually they do it every day but today they get to be really hyper about it.
For example, did you know that humans use much less land and water if they eat crops directly rather than through the intermediary of an animal? This is because farmed animals consume much more protein than they produce: most of the protein from their vegetable feeds is used for the animals' bodily functions and not converted to meat, eggs or milk. More water and land is therefore needed to grow crops for farmed animals to eat, leading to deforestation, water scarcity, soil erosion and increased pesticide use.
Let's start with the fact that not all land used for pasture can be converted for grain or veggie production. Let's also note that a large part of what meat animals are fed, such as hay and shredded corn stalks, is waste material from food production for humans. The elimination of meat production would actually require an increase in the use of land for farming in order to make up for the deficit in food production.
In other words, the Vegan propagandists are engaging in mental inversion mode as usual.
And let's face it, a diet without meat is unbalanced. The vegans that I've met tend to resemble socialist labor camp inmates without the labor camp haircut. And they tend to do stupid things like voting for Democrats or neocommunist trash like the Green Party.
What are your questions on this block of instruction?