Left photo shows sun setting at Indian Head on December 21, 2017, at the Winter Solstice. In same photo, you can see Crainy Island, a tiny spot in the Potomac River to the right of the sun. The right-hand photo shows sun setting directly behind Crainy Island on January 25, 2018. Next major stop in my visual sun progression markings is at High Point in VA. That should happen in roughly 6 weeks. Must look it up. Major visual point after that is at Hallowing Point, VA. Sun will reach Hallowing Point around March 21, 2018. I normally use the first house on Hallowing Point as my special marker, rather than the tip of Hallowing Point because the sun sets just about at that house on my daughter’s birthday, 3/24 and then on its return trip south near my son’s birthday, 9/17.
If you can enlarge this photo, Indian Head, Crainy Island, High Point and Hallowing Point can be found.