디데이 (D-Day)

Manage your precious days at a glance!

D-Day is a simple yet powerful app that automatically calculates the D-Day for anniversaries, goal dates, and special occasions.

■ Key Features

▸ Automatic D-Day Calculation

Future dates are automatically displayed as D-23, the current day as D-Day, and past dates as D+500.

▸ Home Screen Widget

Check your upcoming D-Days directly on the home screen without opening the app.

The larger the widget, the more events are displayed, and items for the current day are highlighted separately.

▸ Accurate Push Notifications

Receive notifications at your desired date and time, ranging from the current day up to 180 days in advance.

You can set up to 10 notifications per D-Day.

Notifications turn on automatically upon new registration, ensuring you don't miss important dates.

▸ Lunar Calendar Support

Displays both Gregorian and Lunar dates simultaneously.

Lunar anniversaries (Lunar New Year, Chuseok, birthdays, etc.) are also automatically converted to the Gregorian calendar. ▸ Quick Date Selection

Since you select the year first and then the month, even birthdays from decades ago can be selected in just a few tries.

▸ Recurring D-Day

Set the date to recur weekly, monthly, annually (Solar), or annually (Lunar).

Once the date passes, it automatically moves to the next cycle, and the notification is rescheduled.

▸ Easy Re-registration

Quickly re-register past anniversaries for 1 week, 1 month, or 1 to 3 years later.

You can also set the date manually.

Re-registration is possible immediately on the actual D-Day.

▸ Share as Image

Create a beautiful card image of your D-Day and share it instantly on messengers or social media.

▸ Backup & Restore

You can export your D-Day as a file and restore it.

It can be transferred seamlessly even if you change phones, and you can revert to an automatic snapshot taken before restoration.

▸ Personalize with Emojis

Quickly find and use 293 types of emojis across 8 categories and via search.

Create an aesthetically pleasing D-Day list that is easily distinguishable at a glance. ▸ Dark Mode · Korean/English

Choose the theme and language that suits your preference.

▸ Sort Function

Sort by nearest or newest to quickly find your desired D-Day.

■ Recommended for:

- Those who frequently forget birthdays or anniversaries

- Those who want to manage target dates such as exams, interviews, or travel

- Those who do not want to miss lunar anniversaries (e.g., parents' birthdays)

- Those who want to see their remaining days directly on the home screen

- Those looking for a simple, ad-free D-Day app

■ App Features

- Completely free, no ads

- Works offline (no internet required)

- Use immediately without signing up for an account

- Lightweight and fast execution

- Purple aesthetic design