このツールとは？
The date calculator supports D-day (days until a date), days between two dates, date plus or minus N days, and age in years. Useful for scheduling and anniversaries.
なぜ使う？
Useful when you want to know days until an exam or deadline, days between two dates, a date N days later, or your age in years. Works right in the browser.
使い方
Choose the D-day, period, N days, or age tab, then enter the relevant dates or values. Results are shown immediately.
The date calculator supports D-day (days until a date), days between two dates, date plus or minus N days, and age in years.
活用例
- D-day for exams, deadlines, anniversaries
- Days between two dates
- Date N days later or earlier
- Age in years
よくある質問
Q. What if D-day is 0?
A. That means today. Calculation is based on midnight.
Q. How is age calculated?
A. Age is calculated from birth date to today in full years (Korean-style age).