Prime Minister Narendra Modi has thanked everyone who wished him on his birthday and said these wishes give him the strength to work even harder.<br />''<br />''In a tweet, Mr Modi said, he is humbled by the affection received. He lauded all those people who have devoted this day to various community service initiatives and said their resolve is commendable.<br />''<br />''In another tweet, Prime Minister wrote that he spent the day attending programmes that cover our economy, society and the environment.<br />''<br />''He truly believes that when we collectively work on these spheres, we will fulfil our goal of sustainable and inclusive development, Mr Modi added. <br />''<br />