How long does it take to tan ? !?

You can tan in a few days but the only way to keep the tan is to continue tanning. The tan will fade as soon as you stop tanning. You already have some tan, so in a month you could have quite a good tan. I know that many of us love to have a tan, but do be aware of the dangers of tanning. You are young, so you are at even more risk for skin cancer. Be careful.