The first American Christmas carol was written in 1649 by a minister named John de Brebeur and is called "Jesus is Born".
Male reindeer generally shed their antlers long before December
25, whereas the females retain theirs until at least January. The
reindeer pulling Santa's sleigh are always show as having antlers,
so Santa's reindeer must all be females.
A hard look at the evidence suggests that at least some of Santa's
reindeer were females (the ones giving the directions, no doubt),
some may have been young bulls, and some may have been
neutered males.
Santa also has special bulls (males) which are used for breeding
purposes. These reindeer are not used for flying the sleigh,
only for breeding.
Heap on the wood!-the wind is chill; But let it whistle as it will, We'll keep our Christmas merry still. --Sir Walter Scott
Are Santa's Reindeer Male or Female?