8 April - Chaitra Sukhladi/Ugadi
Chaitra Sukladi is the New Year in traditional Hindu calendar based on the beginning of the new moon. This New Year is observed on the first day of the waxing phase of the moon in the Chaitra month (March - April) in traditional calendar.Shukladi is one of the methods by which a lunar month is determined. Sukladi means starting from the bright half of the month or from the day after Amavasi (no moon).
Chaitra Shukladi can also be called as ugadi as followed in the calendars followed in the states of Maharashtra, Karnataka and Andhra Pradesh.
13 April - Vaisakhi
Vaisakhi, also known as Baisakhi, Vaishakhi, or Vasakhi) is a festival celebrated in the Punjab region. The festival coincides with other festivals celebrated on the first day of Vaisakh, in some regions of India. Vaisakhi is especially important for the Sikh community as it marks the establishment of the Khalsa.
The festival is also celebrated by Hindus and Buddhists for different reasons including the start of a new year. People in the Punjab Region regard Vaisakhi as a harvest festival and the Punjabi new year.
14 April - Ambedkar Jayanti
Bhim Jayanti is a festival observed on April 14 every year to commemorate the memory of Dr. Babasaheb Ambedkar, crusader for the upliftment of the oppressed classes. This day is celebrated as birth anniversary of Dr. Ambedkar who born on this day in the year 1891. It is a public holiday in all of the Indian states. It is a customary tradition to pay homage to Babasaheb’s statue at the Parliament, New Delhi by the President, Prime Minister, Leaders of prominent parties etc. on this day.
14 April - Mesadi/Vaisakhadi
Vaisakhadi or Mesadi is a harvest festival, as a thanksgiving and a celebration of the hard work of the farmers. These festivals are also traditionally an occasion to mark a new beginning and are celebrated as New Year in many parts of the country.
15 April - Rama Navami
Sri Rama Nawami is a Hindu festival, celebrating the birth of the god Rama to King Dasharatha and Queen Kausalya in Ayodhya. Rama, the 7th avatar of Vishnu, is the oldest known god having human form. The holy day falls in the Shukla Paksha on the Navami, the ninth day of the month of Chaitra in the Hindu calendar. Thus it is also known as Chaitra Masa Suklapaksha Navami, and marks the end of the nine-day Chaitra-Navaratri (Vasanta Navaratri) celebrations. Rama navami is one of the most important Hindu festivals.
20 April - Mahavir Jayanti
In Jainism, Mahavir Jayanti, also known as Mahavir Janma Kalyanak, is the most important religious holiday. It celebrates the birth of Mahavira, the last Tirthankara. On the Gregorian calendar, the holiday occurs either in March or April.
He was born on the thirteenth day of the rising moon of Chaitra, month. The chronology accepted by all Jains placed Mahavir's birth in 599 B.C.E.