About Random Date Generator
This tool allows you to generate a list of random dates within a specified range. You can customize the number of dates to generate, the desired output format, and the separator used between dates if generating multiple. There's also an option to attempt to generate unique dates within the list.
Random dates are useful for creating test data for applications, populating databases with sample date entries, simulations, or for any scenario where you need a set of arbitrary dates within certain boundaries.
How to Use This Tool
- Start Date & End Date: Select the beginning and end of the range from which random dates will be picked.
- Quantity to Generate: Enter how many random dates you need.
- Output Date Format: Choose your preferred display format for the generated dates (e.g., YYYY-MM-DD, MM/DD/YYYY, "Month D, YYYY").
- Separator Between Dates: If generating multiple dates, select how they should be separated in the output list (e.g., Newline, Space, Comma, or a Custom string).
- Generate Unique Dates Only: Check this box if you need each date in the generated list to be unique (at the day level for most formats, or millisecond level for ISOString).
- Click the "Generate Dates" button (or the tool may update automatically as you change options).
- The list of random dates will appear in the output area.
- Use the "Copy List", "Download .txt", or "Download .csv" buttons to save your results.
All date generation is performed client-side in your browser using Day.js for reliable date manipulation and formatting.
Frequently Asked Questions
How are the random dates generated?
The tool picks a random millisecond timestamp between the start date's timestamp (inclusive) and the end date's timestamp (inclusive). This timestamp is then converted into a Date object and formatted using the Day.js library according to your selected output style.
What date formats can I choose for the output?
Several common date formats are available, including ISO standard (YYYY-MM-DD), US style (MM/DD/YYYY), European style (DD/MM/YYYY), descriptive formats like "Month D, YYYY", and the full ISO string with time and UTC timezone information.
What does "Generate Unique Dates Only" do?
When checked, the tool attempts to ensure that each date generated in the list is unique based on its formatted string (if using ISOString with time, uniqueness is at millisecond level). For date-only formats, it ensures day-level uniqueness. An error may occur if the requested quantity of unique dates exceeds the available unique possibilities in the selected date range and format.
Is there a limit on the quantity or date range?
While you can select dates far in the past or future, extremely large ranges combined with a high quantity of unique dates might impact performance. The quantity is also limited (e.g., up to 50,000) to ensure browser stability.