Random Birthday Generator

It draws a date of birth at random and works out everything that follows from it: the age today, the day of the week the person was born, the star sign, the generation, and how long until the next birthday. You control the range, either as an age range or as a window of birth years.

A date generator picks any date between two dates you type. A birthday has to land somewhere that produces a believable age, which is a different question — so this tool takes ages or birth years instead of raw dates, converts them to a day window for you, and then reports the age, weekday and star sign alongside the date. If you just need a date between two dates, the date generator is the simpler tool.

Yes. The draw is uniform over every day inside your window, so any particular day has a 0.27% chance in a single year and February gets its fair share. Real birth dates are not evenly spread — September is busier than February in much of the northern hemisphere — so this is an even random draw rather than a simulation of real birth patterns.

That is the default. Enter the youngest and oldest age you want and the tool converts that into the exact window of birth dates that produces those ages today, including the leap-year edge cases. Preset buttons cover children, teens, adults and over-65s.

They fill in a birth-year window for you: Gen Alpha, Gen Z, Millennials, Gen X, Boomers, Silent Gen. The year ranges follow the Pew Research Center definitions, which are the ones most widely quoted — other researchers move the boundaries by a year or two, so treat them as a convention rather than a fact.

In completed years, the way people say their age: the year difference, minus one if the birthday has not happened yet this year. The maths runs on whole days in UTC rather than on local timestamps, so a result can never come out a day off because of a timezone or a daylight-saving change.

They can be drawn, because they are real birthdays. The countdown to the next one uses 28 February in common years, which is the more widely used of the two conventions, and the result card tells you it has done that instead of quietly pretending the date comes round every year.

From the conventional tropical date ranges — the ones on birthday cards and in newspapers. All 12 signs are listed on this page with their dates and elements. The true cusp shifts by up to a day from year to year because the Sun does not enter a sign at the same clock time annually, so a birthday right on a boundary can technically fall either side. No horoscopes, readings or personality claims are attached: the tool states which sign the date falls in and stops there.

Up to fifty in one draw, with no duplicate dates inside a single batch. You can copy them all to the clipboard or save them as a text file, which is what makes it usable for filling a test database rather than one form.

It is a good reason to use it. Test systems should never be seeded with real customers' dates of birth, and a generated birthday gives you a valid, plausible value with nobody's actual data behind it. Pair it with an age range that matches whatever your form validates and you can test the boundaries deliberately.

No. Every date is drawn at random inside a range you set. Any resemblance to a real person's birthday is coincidence, and with a few hundred thousand possible dates in a wide window that coincidence is inevitable rather than meaningful — it is not a lookup of anybody.

No. There is no account, no cookie storing results and nothing sent to a server — the whole tool runs in your browser. Reload the page and everything you drew is gone, which is why the copy and save buttons exist.

Because age is worked out against today's date, read from your device when the page loads. A birthday you generated last year is a year older now. The date itself never changes; the age beside it is a live calculation, not a stored value.

Free and unlimited, with no sign-up and no email. It works the same on a phone, a tablet or a desktop, and nothing needs installing.