It sounds strange, but for a long time it was not clear what exactly to consider as the birthday of the project - the date of registration of the domain or the date the site was launched and the date of registration of the first user? If the first, then the domain habrahabr.ru was registered on April 18, 2006. However, it is not enough just to register a domain name - you need to make sure that life is born on it. Therefore, as a holiday date, we like the day the site was launched on May 26, 2006. On the same day the first user of the site was registered -habrahabr.From a warm lamp post released 4 years ago