날짜 및 시간 계산기

날짜 간 일수, 정확한 나이, 영업일, 시간대, Unix 타임스탬프, ISO 주 번호와 일출·일몰 시간을 계산하세요.

계산기 15개 · 검증된 예제 87개

알맞은 계산 찾기

날짜

시간

달력

태양과 하늘

계산기 선택 방법: 날짜와 시간

Calendar dates or elapsed time?

A date difference counts calendar boundaries; elapsed hours compare instants. Choose the date tool for days between events, the age tool for completed years and months, and the hours tool for shifts or timesheets. Decide whether to include the first or last day. For a deadline, choose working days and supply the weekend pattern and holidays that apply to your organization. A holiday calendar from another region can produce a plausible but incorrect due date.

두 날짜 사이의 일수 · Working-day deadlines · Exact age

Use the event's date and time zone

Clock readings can repeat or disappear when daylight-saving time changes. Enter the actual dates and named time zone when you need elapsed time across such a change. A fixed UTC offset describes one offset, not a region's seasonal rules. Unix timestamps represent instants; confirm whether your source counts seconds or milliseconds. For recurring meetings, compare more than one date because different regions change their clocks on different schedules.

Hours across clock changes · Meeting planner · Unix timestamps

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