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D-day Calculator
Calculate the number of days until a specific date, or find the date N days from a given date.
💡 How to Use
In the 'D-day Count' tab, select a target date to instantly see the D-day count from today. Future dates show as D-30 (days remaining), past dates as D+15 (days elapsed). In the 'Date Calculator' tab, add or subtract days from any base date to find the resulting date. Great for tracking exams, anniversaries, project deadlines, and more.
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FAQ
Does D-day include the target date?▼
Following Korean convention, the target date itself is D-0. For example, if the exam is tomorrow, it shows D-1.
Does timezone affect D-day calculation?▼
All dates are normalized to midnight (00:00:00), so the calculation is consistent regardless of timezone.
What happens if I enter a negative number of days?▼
In the 'Date Calculator' tab, entering a negative number subtracts days from the base date to find a past date.