New Year's Day, also known as Jour de l'An in Monaco, is a public holiday celebrated on January 1st. This day marks the start of a new year according to the Gregorian calendar. New Year celebrations in Monaco are unique and spectacular, reflecting the country's wealth, glamour, and love for festivity. It is regarded as an important time for the Monegasques for renewal and setting goals for the New Year.

The celebrations of New Year's Day are known for lavish parties and grand fireworks. Notably, Monaco's renowned Monte-Carlo casino-squared hosts one of the largest celebratory events with entertainment that includes live music and performances and culminates in a beautiful fireworks display at midnight. Streets are adorned with lights and decorations, adding to the festive spirit. Residents and visitors relish traditional meals and raise a toast to the advent of a promising new year.

New Year's Day in Monaco is not just limited to partying and celebrations; it is also a time for family and introspection. Many local customs and rituals are associated with the first day of the year. Residents often visit churches for the first mass of the year and spend quality time with their families. Moreover, it is a custom to exchange gifts and cards with loved ones on New Year's Day, symbolizing affection and friendship for the year to come.