Libya's official time is GMT - 1, and the time does not change between summer and winter. Dress reasonably and remember that the Libyan people are very hospitable. But, please do not be used and then blame the people or culture. It is not an excuse to be ignorant of the Libyan or Islamic customs. Also if you intend to travel around Libya, either make arrangements with a travel agency, or have a Libyan national escort you.
Libyan officials are very reasonable, but no one likes to see tourists wondering around.
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