Random Birthday Generator
Generate a random birth date that falls within the selected age range on the chosen as-of date.
How to use Random Birthday Generator
1. Enter Minimum Age, Maximum Age, As-of Date. 2. Browser pseudorandom choices are for everyday examples and organisation. Results can repeat between runs; this does not provide a certified lottery, secure secret or audited draw. Birthdays are limited to years 0100–9999 and cannot be after As-of Date. February 29 anniversaries clamp to February 28 in non-leap years, matching the declared age convention. This generates a fictional date without identifying a person. 3. Select Generate or press Enter from a single-line field. In multiline text fields, Enter inserts a line break. 4. Select Copy result to copy the answer, or Reset to clear the form and result.
Why use this tool?
Use Random Birthday Generator when you need random birth date. Browser pseudorandom choices are for everyday examples and organisation. Results can repeat between runs; this does not provide a certified lottery, secure secret or audited draw. Birthdays are limited to years 0100–9999 and cannot be after As-of Date. February 29 anniversaries clamp to February 28 in non-leap years, matching the declared age convention. This generates a fictional date without identifying a person.
How the calculation works
Choose uniformly among eligible calendar dates whose completed calendar age is in the entered inclusive range on As-of Date. Browser pseudorandom choices are for everyday examples and organisation. Results can repeat between runs; this does not provide a certified lottery, secure secret or audited draw. Birthdays are limited to years 0100–9999 and cannot be after As-of Date. February 29 anniversaries clamp to February 28 in non-leap years, matching the declared age convention. This generates a fictional date without identifying a person.
Example
Worked example: Minimum Age = 0; Maximum Age = 0; As-of Date = "0100-01-01". Result: 0100-01-01.
Practical tip
Check the random birthday input and output convention before reusing the result.
Frequently asked questions
How does Random Birthday Generator work?
Choose uniformly among eligible calendar dates whose completed calendar age is in the entered inclusive range on As-of Date.
Which assumptions and limits apply?
Browser pseudorandom choices are for everyday examples and organisation. Results can repeat between runs; this does not provide a certified lottery, secure secret or audited draw. Birthdays are limited to years 0100–9999 and cannot be after As-of Date. February 29 anniversaries clamp to February 28 in non-leap years, matching the declared age convention. This generates a fictional date without identifying a person.
What should I check before reusing the result?
Match the input units or text-counting convention to your task. Copy result reuses the displayed answer; Reset clears it.