Approximately 300,000 people climbed Mount Fuji in 2009. The most popular period for people to hike up Mount Fuji is from July to August, while huts and other facilities are operating and the weather is warmest. Buses to the trail heads typically used by climbers start running on July 1. Climbing from October to May is very strongly discouraged, after a number of high-profile deaths and severe cold weather. Most Japanese climb the mountain at night in order to be in a position at or near the summit when the sun rises. The morning light is called "goraikō", "arrival of light".