D-Day & Age: Countdown

D-Day & Age is a free countdown and age calculator — track the days until or since the dates that matter, and find out exactly how old you are. Birthdays, anniversaries, due dates, exams, trips, sobriety, a new job — see every important day at a glance and never lose count.

Add a date and the app instantly shows your D-Day: how many days are left (D-100) or how many have passed (D+30). The list sorts itself so the closest day is always on top.

■ Countdown & count-up

• Track days until a future date, or days since a past one

• Clear D-Day / D+Day labels, recognizable anywhere

• List auto-sorts by what's closest to today

■ Recurring anniversaries

• Set events to repeat every year or every month

• Birthdays and monthly milestones roll forward automatically

• Leap-day (Feb 29) dates handled correctly

■ Milestones

• See big milestones for any date: 100, 200, 300, 500, 1000, 2000 days

• And year marks: 1, 2, 3, 5, and 10 years

• Perfect for couples, parents, and personal goals

■ Age calculator

• Your international age (full years) and total days lived

• Korean age shown too, for reference

• Just enter a birth date — works for anyone

■ Simple & private

• Fast, clean interface with smooth haptics

• Share any countdown or age result with friends in one tap

• Works offline — no account required

■ Free & ad-supported

D-Day & Age is completely free and supported by ads, with an optional one-time Remove Ads purchase if you'd prefer an ad-free experience.

Countdown, day counter, d-day, anniversary tracker, age calculator, days until, days since — D-Day & Age keeps every important date and every birthday just a tap away.