Random Date Generator

Written byOleh Soloninupdated 5 October 2026

Seed

The same seed always gives the same dates.

From

How many dates

Result

Date2026-07-15 — Wednesday
All the dates2026-07-15 — Wednesday
Days in the range365
That in years1
How many drawn1
What matters
Dates are drawn independently, so a list can repeat one — exactly as a genuinely random draw would.

A date, and the weekday that comes with it

Picks a random date between two dates and shows the day of the week and the length of the range.

Picking a date at random comes up more often than it sounds: choosing a day for a draw, scheduling something deliberately arbitrary, or generating test data that spans a year.

The day of the week matters as much as the date, so it is given alongside. A random date that lands on a Sunday is not much use for a working meeting.

How to use

Set the start and end of the range.
Say how many dates you need.
Look at the span in days: it decides how likely a repeat is.
Remember that the dates are drawn independently, so a list can contain the same date twice.

What the span actually means

Each row is a run of this calculator for one range. The span counts both ends, which is why a year comes to 365 rather than 364.

The span matters less in itself than for how likely a repeat becomes when several dates are drawn. The same arithmetic as the birthday problem applies: six dates from a one-month range already repeat more than forty percent of the time, while six from a decade almost never do.

Runs of this calculator for three ranges.
Range	Days	Years
January 2026	31	0.08
2026	365	1
2020–2029	3,653	10

What this calculator shows

One or several dates with their weekdays
The number of days in the range
The range expressed in years

What to keep in mind

Both endpoints are included in the range.
Dates are drawn independently, so a list of several can repeat one — which is what a genuinely random draw does.

FAQs

Can the same date come up twice?

Yes, if you draw several. Each is picked independently, exactly as rolling a die twice can give the same face twice.

Are the endpoints included?

Both of them. The range from 1 to 31 January is 31 days, not 30.

Can I exclude weekends?

Not directly here. For an even chance among weekdays, draw again whenever a weekend comes up; shifting weekends to Monday would make Mondays three times as likely.

Why the seed?

So the result can be reproduced: the same seed and range give the same date. On its own that does not prove the seed was not picked to suit — for a fair draw, agree the seed before it runs.

Why does the list contain repeated dates?

Because each date is drawn independently, exactly as a genuine random pick behaves. If repeats are unwanted, draw one at a time and discard any that match.

Why does a year come to 365 days rather than 364?

Because both ends of the range are included. 1 January to 31 December inclusive is 365 days; in a leap year the calculator returns 366.

Worked example

A date in 2026

Input: seed "unitools", 1 January to 31 December 2026, 3 dates

Output: 15 July 2026, a Wednesday

Note: The range is 365 days. Because the draws are independent, three dates out of 365 have about a one percent chance of containing a repeat.

Useful links

All tools in Random Choice

Random Date Generator

Result

Related tools

Working Days Between Dates

Date Calculator

Day of the Week Calculator

Useful links