Project planning
Measure how many working days sit between kickoff and launch.
단위 변환기
날짜 기간 계산기
두 날짜 사이의 시간을 초 단위로 측정합니다.
시작일과 종료일을 선택하여 해당 기간의 길이를 일, 주, 월, 연도 및 일반적인 근무일 단위로 즉시 확인하세요.
Calendar-day difference
Date after or before N days
Weekdays only vs business days with holidays
Count days between dates
Pick a start and end date to measure the calendar span. Results use standard “between dates” semantics, so the same day returns 0 days.
Quick planning presets
Set the end date from the start date with one tap for common planning horizons.
Days between your dates
There are 30 calendar days between 2026년 2월 27일 and 2026년 3월 29일.
Months and years are approximate so you can estimate longer timelines quickly.
Calendar days
30
Weekdays only (Mon–Fri)
20
Counts weekdays after the start date up to the end date.
Selected workweek days
20
Mon-Fri
Business days with holidays
20
Starts from the weekday count, then removes national public holidays for the selected country.
Weeks (exact)
4.29
Months (approx.)
0.99
Years (approx.)
0.082
Excluded holidays
No holiday dates were excluded for the current range and workweek.
Add or subtract days from a date
Find the date after 7, 30, or 90 days, or move backward from a deadline to a planning start date.
Offset shortcuts
Use positive values for future dates and negative values for past dates.
+30 days from 2026년 3월 29일 is 2026년 4월 28일.
Resulting date
2026년 4월 28일
Day of week
화요일
Weekdays and business days
Compare the raw weekday count with a holiday-aware business-day count so you can plan staffing, approvals, shipping, and project schedules more accurately.
The holiday-aware count uses public holidays for the selected scope.
Optional. Use a more specific holiday scope when your planning depends on state-level public holidays.
Custom workweek
Pick the weekly schedule that matches your team, operation, or market before holidays are removed.
United States
Public holidays can be filtered by the selected holiday scope. Company shutdowns and custom leave calendars are not included.
2026
When this date calculator helps most
Shipping and procurement
Check whether a quoted lead time includes weekends or public holidays.
HR and operations
Count business days across notice periods, onboarding windows, or approval timelines.
자주 묻는 질문
윤년이 처리되나요?
예. 계산기는 실제 달력 일수를 계산하므로 윤일과 월의 길이가 자동으로 포함됩니다.
영업일은 어떻게 계산되나요?
총 영업일에는 월요일부터 금요일까지가 포함되며 토요일과 일요일은 제외됩니다. 공휴일은 제외되지 않습니다.
시간을 거슬러 측정할 수 있나요?
물론입니다. 종료일이 시작일보다 빠르면 도구가 자동으로 날짜를 바꾸고 양수 기간을 반환합니다.