18 September 2027

• 261st day of the year. There are then 104 days left in 2027.
• 38th Saturday of 2027.
• on the 37th week of 2027 (using ISO standard week number calculation).
• Birthstone for this day: Sapphire

There are no major holidays or observances in South Africa for this date.

• National Cheeseburger Day - Popular in: United States, Canada
• Día de Amor y Amistad (Colombia) - Colombia
• Oktoberfest (Start) - United States
• Batman Day - Popular in: United States, United Kingdom
• Chile Independence Day - Popular in: United States
• Fiestas Patrias - Chile
• Dia da Independência do Chile - United States
• Oktoberfest - Germany
• AIDS and Aging Awareness Day - United States