The celebrations of 18th Pravasi Bharatiya Divas (PBD) kicked off on Wednesday, with around 6,000 non-resident Indians (NRIs)-- including business leaders, academicians, economists and philosophers, from 75 countries--set to participate in the convention organised in Odisha's Bhubaneswar over the next three days. The Pravasi Bharatiya Divas marks a significant occasion for New Delhi to celebrate and strengthen its relationship with the global Indian community.