That is a sweet hat. What is it you wish to know, other than the date?
It dates to the early to mid 1950s. Flowers look to be glued to the foundation, the foundation materials (looks like buckram and satin) were blocked on a wooden hat block, edged with velvet piping and may also have a wire under the piping. Flowers might possibly be from Japan, as are the tiny pearly stamens.
Very pretty!