When it is noon in Western Europe, in Per it is 6 am. When it is noon in Lima, it is 3 am in Japan. Clothing Remember that when it is winter in the USA and Europe, it is summer in Per . In the highlands, when it is sunny during the day, you should dress lightly but carry something to cover up, because it is cool in the shade. At night you will need a jacket because it becomes cool or cold according to the altitude.
Nobody wears an overcoat.
Weights and measures The metric system of weights and measures is compulsory. Health On arrival in Andean cities, you should allow your system to adapt naturally to the thinner air with less oxygen. Although you may not be affected at all by the altitude, eat and drink as little as possible to avoid soroche, or mountain sickness, and by your second day in the Andes, you should be fully acclimated. Watch out for sunburn, use HPF sunscreen. Drink only bottled water, avoid ice cubes and tap water, raw vegetables and salads.