You can climb to the top the whole year; together with the pilgrims only in January and February.
Adam's Peak, the place where Adam first set foot on earth. It's a holy mountain for Buddhists, Muslims, Hindus, and Christians. The Buddhists believe it was left by Buddha, Hindus to Shiva and Muslims to Adam. On top of the 2243 meters high peak is a monastery. If you want to enter you have to take off your shoes which is common to sacred places. It's a 5-6 hours hike to the top and back. If you start in the afternoon, you are much faster. Going back in the dark means you can watch the spectacle of the pilgrims carrying a torchlight while getting to the peak. To be honest, you have to climb up and down on "thousands" steps. The whole way is dirty with garbage along the side. There are loudspeakers making you listen to prayers and advertisements. We got almost mad on the way back. On the way up we saw several guys carrying coins in huge bags down; the donations of the pilgrims. The village itself was awful like the accommodation. To be honest, we should have given it a miss. Of course, it sounds interesting, but we were relieved being back. We didn't feel safe at all on the hike back in the darkness.