Here is the Hindu Festivals calendar for the month of April 2010. The calendar includes major festival dates and auspicious days in April. Some of the major festivals which falls in the month of April 2010 . The detailed calendar is given below.

13th April 2010- Baisakhi - Punjabi New Year Festival

14th April 2010-Amavasya – (Chaitra Amavasi or Adhik Vaishakh Amavasya),Chithirai Vishu or Puthandu (Tamil New Year)
Mesha Sankranti 2010 -Maha Vishuba Sankranti – Mahavishuva Samkranti, Goru Bihu
15th April 2010-ishu 2010 Kerala zodiac New Year or Malayalam astronomical New Year,
Bengali New Year – Naba Barsha or Poila Baisakh 2010,
Rongali Bihu or Bohag Bihu 2010 – Assam New Year.
16th April 2010-Gosain Bihu 2010 (Third day of Assamese New Year celebrations),
Chithirai Brahmotsavam Festival at Meenakshi Sundareswarar Temple, Madurai, Tamil Nadu
20th April 2010-Shasti Vratham
21st April 2010-Budhashtami
24th April 2010-Kamala Ekadashi or Padmini Ekadasi 2010,
Thrissur Pooram 2010 – Trichur Pooram
25th April 2010-Ekadashi ,Koodalmanikyam Temple or Kudal Manikkam Temple Festival
26th April 2010-Pradosha Pooja – Soma Pradosh or Chandra Pradosha Puja
28th April 2010-Adhik Vaishaka Purnima,Swathithirunal Jayanti