Alpashi Arattu: It is a festival celebrated in the Padmanabhaswamy Temple located in Thiruvananthapuram, Kerala, India. 

Alpashi Arattu is a significant festival of the Padmanabhaswamy Temple and is celebrated in the Malayalam month of Thulam (October-November). The festival lasts for ten days and ends with the Arattu ceremony. 

During the festival, the temple is beautifully decorated, and various cultural programs and processions are organized. On the ninth day of the festival, the idol of Lord Padmanabhaswamy is taken out in a grand procession on a decorated elephant to the Shanghumukham Beach for the 'Arattu' ceremony. The Arattu ceremony is a symbolic ritualistic cleansing of the idol and is performed in a nearby pond. 

Thousands of devotees gather to witness the grand procession and the Arattu ceremony. The festival is an important event for the people of Thiruvananthapuram, and it is considered auspicious to witness the procession and offer prayers during the festival. 

Attukal Pongala: It is a famous festival celebrated annually in Thiruvananthapuram. It is considered to be one of the largest all-women religious gatherings in the world, with thousands of women participating in the festival every year. 

Attukal Pongala is typically held in the Malayalam month of Kumbham, which falls in February or March. The festival is dedicated to the Hindu goddess Bhagavathy, who is believed to be an incarnation of the goddess Parvati. 

The main ritual of the festival involves women preparing a special sweet dish called pongala, which is made by boiling rice, jaggery, and coconut in earthen pots. The women gather in large numbers on the streets surrounding the Attukal Bhagavathy Temple in Thiruvananthapuram and cook the pongala on open fires, using firewood or charcoal. The cooked pongala is then offered to the goddess as a form of prayer and thanks giving. 

The festival is also marked by various cultural events and processions, including traditional music and dance performances. Devotees from different parts of Kerala and beyond come to Thiruvananthapuram to witness the festival and participate in the rituals. 

Beemappally Uroos, is a religious festival celebrated annually in Beemapally. The festival is held at the Beemapally Dargah, which is the mausoleum of Syedunnisa Beema Beevi, a revered Islamic saint who lived in the 18th century. 

The festival is a celebration of the life and teachings of the saint, and attracts thousands of devotees from all over the state and beyond. It is usually held in the month of February or March and lasts for ten days. 

During the festival, the dargah is decorated with lights and flowers, and various cultural programs and religious rituals are held. Devotees offer prayers, light candles, and offer food and clothes to the poor and needy. 

One of the highlights of the festival is the procession of the holy relics of the saint, which is carried out on the ninth day of the festival. The procession is accompanied by traditional music and dance, and is a spectacular sight to behold. 

Overall, Beemapally Uroos is a vibrant and colorful festival that showcases the rich cultural heritage of Kerala's Muslim community, and is a must-see for anyone visiting Thiruvananthapuram during the festival season. 

Vettukadu perunnal, is a popular Christian festival celebrated in Thiruvananthapuram. It is also known as the Feast of Our Lady of Good Health and is celebrated at the Vettukadu Church, which is dedicated to the Virgin Mary. The festival is usually held in the month of February or March, and it is a major event for the local Christian community. 

During the festival, devotees gather at the church to offer prayers and attend special masses. The highlight of the festival is a grand procession, known as the 'perunnal procession', which takes place on the final day of the festival. The procession involves carrying a statue of the Virgin Mary, adorned with flowers and other decorations, through the streets of the town. The procession is accompanied by music, dance, and fireworks, and it attracts large crowds of people from all over the region. 

Overall, Vettukadu perunnal is a vibrant and colorful festival that celebrates the faith and culture of the Christian community in Kerala.