How Christmas trees began . . .
Long before the beginning of Christianity, trees and plants that remained green all year had a special importance for people in the winter. Just as people today decorate their homes during the festive season with pine, spruce, and fir trees, people of ancient times hung evergreen boughs over their doors and windows. In many countries it was believed that evergreens would keep away witches, ghosts, evil spirits, and illness.
In the Northern hemisphere, the shortest day and longest night of the year falls on December 21 or December 22 and is called the winter solstice.
Christmas trees are grown in all 50 states including Hawaii and Alaska.