This week my friend Irina complained to me that her son's 17th birthday fell on the Boston Marathon Day and friends weren't able to come and celebrate with them in their Brookline home until the roads opened. Previous such coincidence was 17 years ago when her son Daniel was just born in the Beth Israel Hospital that is right along the marathon route and all the visitors got delayed till the end of the marathon festivities. Irina mused that I could probably calculate when the next such coincidence would happen and I thought why not turn it into a puzzle.
Daniel's birthday is April 21.
Boston Marathon is held on Patriots Day that is 3rd Monday in April.
Is Irina correct that the Boston Marathon coincided with Daniel's birthday only twice: in 1997 when he was born, and now in 2014? When is the next time such a coincidence will happen?
Image from Flickr, distributed under CCL.
Your thoughts and suggestions are accepted any time until midnight Eastern Time on Sunday, on our Family Puzzle Marathon.