Is there a way of telling whether a photo was taken a few years after the clothing style was fashionable or they were bang up to date 
Gadget
Hi Gadget,
As far as I've been able to make out with the hundreds of photos I've looked at, there are only two ways to be 100% certain of an exact date, and they are to have a photo of a particular event for which you know the date, or to have the date written on the back by someone who knew what it was (e.g. it was written on at the time).
You can use a combination of fashions in hair and clothing, posing styles, photograph type, photo size, mounting style (e.g. on a card, postcard, not stuck to anything), photographer's details, and decoration on the card to guess at a date pretty near to when the photo was taken, but it's pretty hard to be 100% sure. If it was that easy, we wouldn't have these fun little contests would we!

Prue