These examples cover major regional and diaspora traditions. They are representative, not an exhaustive list of every country or community that observes Songkran; customs can also vary within a country.
Thailand
A national holiday from April 13 to 15. Water fights fill Bangkok's Silom Road and Khao San Road and the old city of Chiang Mai.
Lao communities
Pi Mai Lao is a related but distinct Lao New Year, celebrated with temple visits, processions, respectful water blessings and festivities, especially in Luang Prabang.
Myanmar communities
Thingyan is Myanmar's related but distinct New Year water festival, combining water play with merit-making, respect for elders and charitable acts.
Cambodian communities
Choul Chnam Thmey is Cambodia's related but distinct April New Year, observed with temple offerings, family rituals, games and some water customs.
Tai communities in China, India and neighboring countries
Dai and other Tai peoples hold closely related April water and New Year festivals, with local names, Buddhist observances and community rituals.
Sri Lanka & parts of South Asia
Sinhala and Tamil New Year and several solar New Years occur at a similar astrological transition, but they are distinct traditions and are not Songkran.