Photos can be old or new, and be of any subject as long as they are clean and appropriate for all eyes to see. How much detail you give in the caption is entirely up to you. Please don't post random photos that you find online.
"To all of my wonderful readers, who take time out of their busy days to stop by and check in on happenings here.......No matter what you celebrate, or even if you don't celebrate at all, the sentiment remains the same, Enjoy your time with family and friends. Life is so short, make the most of it. Wishing you all a happy and peaceful holiday season."