I've just picked up a vintage Perpetual Date Seiko for a friend who wanted it only because it was born in April 1973 - and so was he. I know absolutely nothing about this watch other than it has a 'perpetual date' feature - something I believe it has common with other watches.
So my dumb question is this: what is a perpetual date watch for and how would you use it?
I looked into perpetual calendars on Wikipedia on started bleeding from my ears after two paragraphs...so in terms that stupid person might understand please!
A photo of the Seiko is posted below: