The 'old man' in 'A Christmas Story' is the father. He's a rather gruff but loveable character. He has his quirks, like being obsessed with winning a major award which is a lamp in the shape of a woman's leg in a fishnet stocking. He often gets frustrated with the daily life and the antics of his family, especially during the Christmas season, but deep down he cares about his family a great deal.
There could be other old men in various Christmas stories. Maybe an old grandfather figure who passes on the traditions and stories of Christmas to the younger generations.
His role could be that of a family provider. He might be responsible for getting the family Christmas presents and making sure there's a nice dinner on Christmas day.
Well, the movie doesn't give an exact age for the old man. But from what we see, he seems to be in his late middle age, maybe around 55 or 60, judging by his looks and actions.
In some Christmas stories, there could also be an old wise man. For example, in the Nativity story, the three wise men were on a journey to find the baby Jesus. They were older, wise, and brought gifts of gold, frankincense, and myrrh. They are important characters in the religious Christmas narrative.
He could say 'Christmas, children, is not a date. It is a state of mind.' This quote emphasizes that Christmas is more than just a day on the calendar. Old men, with their years of experience, might tell this to younger generations to convey that the spirit of Christmas, like the stories associated with it, is about having a certain attitude of love, giving, and celebration all year round.