Talking about Kolkata peak travel time, it can be said that period between October-march is the best time to visit Calcutta. This is the perfect time to savor the autumn season that is in its full bloom. Not only the weather is pleasant, but also, it is the time of festivities. Durga puja is a festival that is celebrated with great pomp and show. Laxmi puja and Diwali follow it. January-February is the period that witnesses the conduct of Calcutta book fair that acts as a platform for bringing people from all over the world together under one roof. Thus, if you have an option to choose the time period, then plan out your tour during October-March, as it is the ideal time to visit Calcutta.