The D-Day Calculator calculates how many days are left until a specific date based on today's date.
What is D-Day?
D-Day originated from a US military term used to indicate the date of an attack or the start of an operation. It is now commonly used to count down to a specific date in everyday life.
The first recognized use of D-Day was on June 6, 1944, during the Normandy landings. Various theories exist about the meaning of the “D” in D-Day: Day, Destination, Disembarkation, or Decimal. As a military term, D-Day is used to refer to counting the days remaining until a planned operation. Today, it’s often used to mark important upcoming days such as major election dates, exam days (like national college entrance exams), or significant interview days.