I have a button that announces that I am voting in honor of a veteran -- my father. My wife has one in honor of her father. We wore them on primary day. They were created by the Secretary of State's office in a nifty program called, helpfully, Vote in Honor of a Veteran. It has been hugely popular in the commonwealth. They made 10,000 in responses to citizen requests in the first week, and the county clerks ran out. They are making more for the general election.
Honoring veterans by voting seems like a good subject to contemplate on Memorial Day.