Why does this day exist? Why do people who have a brother or sister deem it necessary to have a day dedicated to that fact? What about those who don’t have siblings? Do they have an official day? Of course not.
This day is a myth. It doesn’t exist. It’s a figment of the imagination. It’s for the insecurities of those who have siblings and can’t handle the real world like only-children like myself.
What a weird day for odd folks. They’ll make a holiday out of anything that has no significance.