To remove a tan, go out with an umbrella, don't go out during daylight, or stay inside. Drastic measures include time traveling or staying off the game for long periods of time. Hats will NOT stop tans from appearing.Your tan will disappear a little bit every day if you haven't been walking around in the sun each day. Also, your tan will begin to disappear on rainy or cloudy days. There are five levels of a tan, each one darker than the last.You can get a tan from June 16th to September 15th. The game has to have a clear sky outside and it must be during daylight hours (when the clock on the upper left-hand corner of the screen has a full picture of the sun, which should be between 8 a.m. and 5 p.m., depending on the time of year). Hope this helps!