Every historic city tells a different story depending on when you arrive, and Kolkata offers an evocative journey through time across the calendar. The golden window to visit falls during the spring and autumn shoulder seasons (April to May and September to October), when pleasant daytime temperatures make walking between medieval avenues and Indian Museum effortless. High summer brings festival energy, al fresco dining beneath historic arches, and vibrant night markets, though pre-booking dated monument passes well ahead is essential. As autumn arrives, harvest markets fill local squares and cooler breezes make excursions and exploring neighboring historic towns a pure delight. Winter reveals the authentic heart of Kolkata, with mist-shrouded monument views, seasonal holiday lights, and warm local hospitality without the peak season rush.