01 · Date calculator

Add or subtract time

Move forward or backward by calendar units.

Starting date

OperationAddSubtractAmountUnitdaysweeksmonthsyears

Result—

02 · Difference

Days between dates

Measure the exact calendar-day gap.

StartEnd

Difference—

03 · Work calendar

Business days

Count Monday to Friday between two dates.

StartEnd

Monday–Friday—

04 · Relative date

Days from today

Find a date before or after today.

Number of days

Direction

AfterBefore

Target date—

05 · Countdown

Days until

Count down to any future or past date.

Target date

Time remaining—

06 · ISO calendar

Week number

Enter any date to find its ISO week and year.

Date

ISO week—