D-Day Calculator
Calculate how many days are left until your target date.
What is a D-Day Calculator?
A D-Day calculator lets you see exactly how many days remain until any important date. Add exams, weddings, trips, anniversaries, or deadlines and watch the countdown in real time. You can manage multiple events at once.
Dates in the future show as D-minus (D-7, D-30, etc.). Today's date shows as D-Day!. Past dates show as D-plus (D+1, D+365, etc.). Enable the yearly repeat option for birthdays and anniversaries so the counter automatically resets each year.
How people use it
Exam countdown
Track days until a big test, certification exam, or college entrance exam so you can plan your study schedule.
Wedding & anniversary
Never miss a wedding date or anniversary again — set a yearly repeat and always know how many days are left.
Travel countdown
Count down to your departure date and use the time to prepare packing lists, visas, and itineraries.
Project deadline
Keep work deadlines and assignment due dates front of mind so nothing sneaks up on you.