Mount Everest is the highest mountain on Earth, meaning its summit is higher above sea level than that of any other mountain. Its summit ridge marks the border between Nepal and China. The summit of Mount Everest is rising at a rate of around 2.5 centimetres per year.
Mt. Everest has two main climbing routes, the southeast ridge from Nepal and the northeast ridge from Tibet, as well as 13 other less frequently climbed routes. Of the two main routes, the southeast ridge is technically easier and is the more frequently-used route. It was the route used by Hillary and Tenzing in 1953. This was, however, a route decision dictated more by politics than by design as the Tibetan border was closed to foreigners in 1949.
Most attempts are made during April and May before the summer monsoon season. A change in the jet stream at this time of year also reduces the average wind speeds high on the mountain. While attempts are sometimes made after the monsoons in September and October, the additional snow deposited by the monsoons makes climbing even more difficult.
In Nepal, the mountain is called Sagarmatha (सगरमाथा, Sanskrit for “Forehead of the Sky”). In Tibetan it is Chomolangma or Qomolangma (ཞ) (”Mother of the Universe”), or in Chinese: 珠穆朗瑪峰 (pinyin: Zhūmùlǎngmǎ Fēng) or 聖母峰 (Shèngmǔ Fēng).
Descripion source: Wikipedia