Date Calculator

Quickly calculate date offsets, spans, workdays, weekdays, and ISO weeks.

Day Counter: Days Between Two Dates

Find the total day span and a year/month/day breakdown instantly.

Start date

End date

Include start date

Result

0 days

0y 0m 0d

Base date

Direction

Mode

Amount

Unit

Target date

2026年4月16日木曜日

2026-04-16

Start date

End date

Country / Region

Include start dateExclude weekends

Result

0 workdays

Total: 0

Weekends: 0

Holidays: 0

Start date

Direction

Workdays

Country / Region

Include start dateExclude weekends

Target date

2026年4月16日木曜日

2026-04-16

Select date

Time zone A

Time zone B

Weekday in A

2026年4月15日水曜日

Weekday in B

2026年4月14日火曜日

Offset difference

+4h 0m

Date to ISO week

Current result

2026 · W16

2026-04-13 ~ 2026-04-19

Year

Week

Reverse lookup range

2025-12-29 ~ 2026-01-04