18 January 2027

• 18th day of the year. There are then 347 days left in 2027.
• 3rd Monday of 2027.
• on the 3rd week of 2027 (using ISO standard week number calculation).
• Birthstone for this day: Garnet

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

• Martin Luther King Jr. - United States, Canada, Puerto Rico
• Winnie The Pooh Day - Popular in: United States, United Kingdom, Canada
• Lima's Anniversary (Aniversario de Lima) - Peru
• Blue Monday (Lunes Azul) - Popular in: Canada, Mexico
• Week of Prayer for Christian Unity (Start) - Canada