Christmas and New Year's Celebrations in the Context of Guinness World Records: The Science of Mass Rituals and Extremes Attempts to set records during Christmas and New Year's are not just a pastime but a cultural phenomenon that demonstrates the human desire to give a quantitative, measurable expression to collective joy and the scale of celebration. These records, documented in the Guinness Book of Records, represent unique data for sociology, engineering, and psychology of mass actions. Records of Scale and Synchronization: Physics of Collective Action The most massive Christmas dinner/New Year's banquet. Such records (such as celebrations by several thousand people at the same time) study the limits of logistics and synchronization. Organization requires solving problems of temperature regime (delivery of hot food), acoustics (toasts must be heard), and social dynamics (preventing conflicts in confined spaces). From a sociological point of view, this is a modeling of an ideal, harmonious festive community. The largest choir performing Christmas carols. The record, set in the Philippines in 2023 with the participation of over 10,000 singers, demonstrates the phenomenon of neurobiological synchronization in a group. Singing in unison triggers the release of oxytocin in participants, reduces cortisol levels (the stress hormone), and creates a powerful sense of unity. From an acoustic point of view, the task is not just loudness, but purity of intonation in an open space with echo delay, which requires the skill of a conductor and technical reinforcement. The longest chain of Santa Clauses or Santas. Such actions (record - several thousand participants) study the viral potential of a single visual code. From a psychological point of view, the temporary "transformation" into a mythological character through uniform - this is a form of role-playing behavior and social catharsis, allowing to go beyond everyday identity. Engineering and Technical Records: Mechanics of ... Read more