The New Year's Eve celebration in Edinburgh commonly called the world's largest is Hogmanay.
Hogmanay is Scotland's traditional celebration of the last day of the year. Edinburgh's modern festival developed into a large, multi-event program with concerts, street gatherings, fireworks, and processions. The word Hogmanay itself refers to the Scottish New Year's observance, while Edinburgh Hogmanay identifies the city's organized festival.
The celebration incorporates older Scottish customs, including first-footing: the first person to enter a home after midnight was traditionally expected to bring good luck, sometimes with gifts such as food or drink. Singing Auld Lang Syne is also strongly associated with the occasion.
Descriptions calling Edinburgh's festival the “world's largest New Year's Eve party” are promotional language rather than a universally audited global ranking. The stable fact is that Hogmanay is Scotland's famous New Year's celebration and Edinburgh hosts one of its best-known modern festivals. It is not the same event as Burns Night, which honors Robert Burns in January.