1914 with after market cowl and windshield topper.
Well to do farmer, all have shoes. Can't make out what they wrote on the windshield.
I wonder if the car was as weathered already in 1917 or if the picture is from when the boy came marching home from France in 1919?
Two family members out of five smiling is over average for the era, so maybe it's the homecoming
The soldier is Johnny. The two who are smiling are Ma and Pa The older man is gramps and the boy is little brother.
Some of Einstein's family, the windshield say's something about E=mc2 . Jim
I think the writing is there E-mail address ? I see an @ symbol.