Women shouldn't wear long skirts to any of Hanoi’s many bia hoi joints; toilets are rudimentary at best, and the predominantly male clientele tend to relieve themselves on the floor. When visiting Hanoi, make sure you choose your season right: December to March can be terribly gray and miserable. April–May is gorgeous. Summer can be compared to a steamy Peruvian jungle. And the weather finally relents in autumn, when the sky turns azure with fresher days.