I'm going to go with "late 1930's".
The colors would most likely have been found in the 1930's. 40's fabrics have more red, yellow & blue in them and the white background would have been slightly brighter.
The prints on the first two are traditional 1930's shapes -- the first one could be from the early-mid 30's. The second one would have been closer to the 40's with it's less defined shape. What is throwing me is the shape of the third one. Spiky shapes weren't typically found in the 30's (or the 40's for that matter, where shapes were less defined). The Art Deco movement was all about round edges, even in architecture and furniture design. So it wouldn't have been a typical fabric for the time, but based on the colors & the other two fabrics, I still think late 30's (or at least pre-War).