Hi Jamie,
yes there is, it's in the image editor - double click a thumbnail to access.
The Info Stamp can put various information onto the image as a filter.
See screen shots attached below including an example.
If you apply that one item to an image and then save the filter as, say, "date stamp", you can select a batch of thumbs or a set of images in the queue, right mouse button and choose Predefined Filter, browse to the "date stamp" item and it will be applied to all the selected images.
Terry

Thanks Terry,

Thought there must be a way of doing it, I'm currently doing a bunch of canvas prints for an exhibition and along with the other single orders it's getting to be a bit hectic. 24 hours to dry for each print and then another 24 hours for the varnish to set, of course a good old pencil has served me well for now. Anyway, I'm gradually working my way through them. Thanks again, I'll have a look at that for the next lot.

Jamie

It's the exif date from the image. The dialogue does say "Image Information". We did not realise you wanted print date.naive is
The alternative is manual entry using floating text in the Page Editor.
Terry

Jamie,
It is not as bad as it sounds 
If you have several images in the queue, you can enter the floating text on the first and use "Link To - all prints in the queue" and the text will then appear on every print. 
Terry

No, when I tried it with different sizes. It's a simple matter to re-position for each image.
I think Jamie, the original poster, was doing a set of all the same size.
Terry