Random Date Generator
Generate random dates or datetimes within a custom range with weekday filters and exclusions.
Random Date Generator
Generate random dates or datetimes within a custom range with weekday filters and exclusions.
About the random date generator
Date ranges and output formats
Choose date-only or date and time mode, set a start and end range, and generate 1 to 100 results. Built-in formats cover dashed dates, slash dates, date-time output, ISO 8601, and custom format strings.
Weekday and date exclusions
Use the weekend shortcut, select specific weekdays, or enter excluded ISO dates to remove them from the candidate pool. If the remaining range cannot provide enough unique values, the tool shows an insufficient range warning.
Local sampling, not security randomness
Results are sampled locally from a seed, with browser secure randomness used only as extra seed entropy. Use the output for planning and sample data, not for passwords, security tokens, lotteries, or fairness-critical draws; nothing is uploaded.
FAQ
Common questions and answers about this topic.
How many random dates can I generate at once?
You can generate between 1 and 100 random dates in a single run. Adjust the "Count" field to set how many results to produce. If your range or exclusions cannot supply that many unique dates, the tool will warn you.
Will the generated dates ever repeat?
No. Within a single generation, all results are unique. The tool only returns dates within your range that are not blocked by weekday or excluded-date filters, and never picks the same value twice. If unique dates are not enough for your count, you will see a warning.
Can I exclude weekends, specific weekdays, or holidays?
Yes. Tick "Exclude weekends" to skip Saturday and Sunday, or use the weekday toggle group to pick any individual days to exclude. For holidays or other custom dates, paste them into the "Excluded dates list" field, one ISO date (YYYY-MM-DD) per line.
What format tokens can I use in the custom format?
Common tokens include YYYY (year), MM (month), DD (day), HH (hour, 24h), mm (minute), and ss (second). Wrap any literal text in square brackets, for example "YYYY[年]MM[月]DD[日]". Invalid tokens trigger an error so you can correct the format before generating.
When should I pick the ISO 8601 output format?
Choose ISO 8601 when the dates feed into a database, API, or programming script. Date-only mode emits values like 2025-01-31, while date + time mode emits values like 2025-01-31T14:30:00+08:00 with the timezone offset, which most languages and tools can parse without ambiguity.