Is this 19th Century or the time of Shakespeare?

Branagh's Hamlet was updated to the 19th Century while staying true to the original text.

The costumes were deliberately understated and of no particular period, the men's uniforms were vaguely 19th century. The women's frocks were vaguely 18th century, but were what the lower classes would have worn.

But mainly, the costumes were deliberately understated in a "pay no attention to the costumes" way, because the film was very low-budget and was all about letting well-known actors go to town on some good Shakespeare.