13 September 2027

• 256th day of the year. There are then 109 days left in 2027.
• 37th Monday 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 New Zealand for this date.

• Day of the Children Heroes (Día de los Niños Héroes) - Mexico
• Zürich Target Shooting Festival ends (Knabenschiessen Montag) - Switzerland
• International Chocolate Day (Día Intl. Del Chocolate) - Popular in: Spain
• Día del Bibliotecario - Argentina
• Dia do Programador - Brazil
• Roald Dahl Day - United Kingdom