What this generates
Uniformly random dates within whatever range you set. Pick a start and end date, the count (1-500), and the output format. Optionally include a random time component (HH:MM:SS) for full datetime stamps.
Five output formats:
- ISO 8601:
2026-05-10, the international standard, sorts correctly as text - US:
05/10/2026, the format Americans recognize - EU:
10/05/2026, day-first, used in UK, Australia, most of Europe - Long:
Sunday, May 10, 2026, verbose readable form - Unix timestamp:
1746780000, seconds since 1970, what databases and APIs often use
Quick range presets cover common use cases: 90s/00s, past 10 years, next 10 years, 20th century.
When you’d use this
- Fake data for testing: birthdays, signup dates, transaction timestamps for dev/test environments
- Database seeding: bulk-generate realistic dates for time-series test data
- Mock CSV files: filling date columns when prototyping import flows
- Stress testing date pickers: feed random dates into UI components to find edge cases
- Game/random art generation: random “release dates” for fictional content
- Privacy-preserving samples: replace real dates with random dates in the same range when sharing data
Uniform distribution
The generator picks dates uniformly at random across the date range. That means every day in the range has equal probability, no clustering near edges, no skew toward weekdays or weekends.
If you specifically need dates that look “realistic” (more recent dates more common, weekdays more frequent), you’d need a weighted generator. This tool is uniform; the bias is on you to add.
Time component caveat
Selecting “include time” appends a random HH:MM:SS to each date. The time is uniformly random across the day (00:00:00 to 23:59:59). For Unix timestamp format, time is always included implicitly (timestamp granularity is seconds).
Common date ranges by use case
- Adult users (18-80): birthday between (now − 80 years) and (now − 18 years)
- Recent activity: past 30 days, past 90 days, past year
- Project timelines: today to 6 months out
- Historical research: a specific century or decade
- Children’s data: now − 18 years to today
For age-realistic birthdays, you’d want a range like 1945-2007. The custom range input lets you specify exactly what you need.
Frequently asked questions
Why does my generated date sometimes show “1999” when I asked for 2020+? Check your range, if start is set to 1995 by default, the slider includes that year. Edit the start date to match your intent.
How can I generate weekdays only? This generator doesn’t filter to weekdays. Generate dates and post-process to drop Saturdays/Sundays (about 28% of generated dates). Or use the working-days-calculator for date-set generation.
Can I generate dates in the future? Yes, set the end date past today. JavaScript’s Date object handles dates from 100 million years ago to 100 million years in the future. The generator works for any sensible range.
What time zone are the times in? ISO output uses UTC. US/EU/long formats use the browser’s local time zone. Unix timestamps are always UTC. For specific time zones, post-process the output.