Como dizer "Horário de verão" em inglês

Hello everybody,

I’m Webdesigner, and I’m producing a site for a tour agency. Sometime I’ve been finding some interesting things around the English language… Then I decided to bring some tips for you, guys.

Today I’m looking for a system about timezone, searching, searching I found a so interesting term. How can I say “horário de verão” in English?

It’s so strange for us, but it’s

DST (Daylight Savings Time)

Just to know:
Portuguese: DST (Doenças Sexualmente Transmissíveis)
English: STD (Sexually Transmitted Disease)

Sorry about my poor English, but I’m trying to improve.

Thanks a lot. See ya!