It's from the early 80s. How do I know? Because I used it to make nighties to go into the maternity hospital to have Debbie - she was born in August, 1980!! This pattern is older than either of my girls! My Grandad always used to say, if you kept a thing for 7 years, you'd find a use for it. I wonder what he'd say about keeping a pattern for 35 years? LOL
The first nightie I made out of this stripey cotton. The stripes have been printed squint on the fabric so it wasn't any use to make anything that would be on show so a nightie is ideal. If you look at the green and black stripes at the left of the photo you'll see that, by the time you get to the other side of the nightie, they've moved upwards by about 4". Nobody sees me in my nightie other than Douglas and, as he says, the stripes are so bright, you don't even notice that they're moving upwards! :oD
The second one is in a purpley-flowered polycotton. Much more "suitable" nightie fabric - but not nearly as much fun!