How random date generator works
This generator picks random dates inside an inclusive range you define with a start and end date. It first converts both dates to a day count, then draws a random whole number of days between zero and the total span, and adds that offset to the start date. This guarantees every result lands on a real calendar day inside your range.
Enter the start and end dates (in YYYY-MM-DD format), choose how many dates to generate, and pick an output format. The unique option ensures no date is drawn twice — useful when you need a sample of distinct days. The maximum unique count is limited by the size of your range.
For reproducible results, enter a seed number. The same seed always produces the same dates, which is handy for test data, mockups, or sharing a result. All generation happens in your browser, so your dates are never uploaded.
Frequently asked questions
How does the random date generator pick a date?
It counts the number of days between your start and end date (inclusive), picks a random whole number in that range, and adds it as a day offset to the start date. The result is always a valid calendar day within your range.
Can I generate dates with no duplicates?
Yes. Enable the unique option and the generator ensures no date appears twice. The maximum number of unique dates is the number of days in your range, so you cannot draw more unique dates than the range contains.
What date formats can I choose?
ISO (YYYY-MM-DD), US (MM/DD/YYYY), EU (DD/MM/YYYY), and a long human-readable format like "January 1, 2024". Pick the one that matches your use case — ISO for data, US/EU for display, long for readability.
Why use a seed?
A seed makes the output reproducible. The same seed always produces the same dates, which is useful for test data, repeatable mockups, or sharing an exact result with someone else.
