End of year

Find the final date of the year and its weekday.

THE CALCULATOR

Days between dates

YOUR DATE TOOLKIT

30 focused tools. Clear methods. No account needed.

Calculations require JavaScript. Browse the tools below:

Days between dates — Count the exact calendar days separating two dates.

Add days — Find the date a number of calendar days from a starting date.

Subtract days — Go back by a chosen number of calendar days.

Weeks between dates — Express a date difference as whole weeks and remaining days.

Add weeks — Move a date forward by whole calendar weeks.

Add months — Add calendar months, including short-month handling.

Subtract months — Move backward by calendar months without invalid dates.

Add years — Find the same calendar date in a future year.

Age calculator — Calculate completed years, months and days on a chosen date.

Next birthday — Find the next birthday and the number of days until it.

Business days between dates — Count Monday–Friday days, with optional holiday exclusions.

Add business days — Move forward while skipping weekends and your holiday list.

Subtract business days — Count backward through working days only.

Day of the week — Discover the weekday for any supported date.

ISO week number — Find the ISO week and its week-numbering year.

Day of the year — Find the ordinal day number within a year.

Days left in the year — Count the days after a date through December 31.

Days in a month — Check the length of any month in a supported year.

Leap year checker — Check a year and see why it is or is not a leap year.

Date countdown — Count calendar days until an event, using a chosen reference date.

Midpoint between dates — Find the calendar date halfway between two dates.

Quarter calculator — See the calendar quarter and its date boundaries.

End of month — Find the last date of a month and the days remaining.

End of year — Find the final date of the year and its weekday.

Nth weekday of a month — Find, for example, the third Monday of a month.

Weekday dates in a month — List every Monday, Friday or other weekday in a month.

Weekend days between dates — Count Saturdays and Sundays within a date interval.

Recurring date planner — Generate a schedule at a fixed calendar-day interval.

Calendar months between — Measure a date interval as completed calendar months plus days.

Date from day number — Convert an ordinal day number into a calendar date.

01 / CONSISTENT

All tools work with calendar dates. A day remains a day across daylight-saving transitions.

02 / TRANSPARENT

Each calculator explains its boundaries, rounding and leap-day handling before you rely on the result.

03 / PRIVATE BY DESIGN

Calculations run locally. Advertising and hosting have separate data practices described in our privacy page.