April 14^th  will commemorate the end of the harvest season; it marks a new year for the Sinhalese people (constitutes 74% of the Sri Lankan population). Special foods, such kiribath (rice cooked in coconut milk) as are prepared, new clothes are worn and horoscopes are cast for the forthcoming year.
From ColomboPage, “The United States today said the upcoming Sinhala and Tamil New Year brings a new opportunity for all Sri Lankans to join together in the spirit of tolerance, reconciliation, and peace.
In a press statement issued Friday, the US Secretary of State John Kerry, on behalf of President Obama and the American people offered “warmest greetings to the people of Sri Lanka and the vibrant global Sri Lankan diaspora”
“This New Year brings a new opportunity for all Sri Lankans to join together in the spirit of tolerance, reconciliation, and peace. As Sri Lankans gather to mark the potential of the New Year, we join in celebrating with you,” his message said.
“As you continue your work to build a prosperous, democratic Sri Lanka, I offer my best wishes for a safe and happy holiday and a prosperous, peaceful year ahead.” 

Source: http://www.colombopage.com/archive_14A/Apr11_1397237499CH.php