Karthika is a popular festival celebrated in various parts of India, particularly in the southern states. It usually falls in the month of November or December, during the lunar month of Karthika. The festival is marked by the lighting of lamps, known as diyas, and is associated with the worship of Lord Shiva and Goddess Durga. During Karthika, people often decorate their homes with lights and flowers, and many participate in rituals and prayers. In some regions, it is also a time for community gatherings and cultural events. The festival symbolizes the victory of light over darkness and is a time for reflection and gratitude.