Climbing a high mountain is a long and gradual process that depends on weather conditions and physical strength, and Mount Everest is no exception. Generally, it takes around eight to ten days to reach Everest Base Camp after spending a few days in Kathmandu.

At Everest Base Camp, you'll spend approximately six weeks focusing on training, proper acclimatization, rotations to higher camps, and the final summit push. The main reason for staying at Base Camp for such an extended period is to adapt to the cold weather, harsh environment, and become familiar with the mountain you are attempting to summit. However, the itinerary for climbing Everest can vary depending on weather conditions, the climber's adaptation to the environment, and other factors.

In general, the entire Everest expedition takes about 8 to 10 weeks (55 to 70 days).