Generate a Date Sequence
Step a calendar date up or down by days, months or years. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Generate a Date Sequence
- 1. Choose a starting date. Type the first date in the sequence into the Start date field. Every following date is calculated relative to this one.
- 2. Set the step size and unit. Enter the Step amount and pick Days, Months or Years as the Step unit. Choose Increasing or Decreasing under Direction depending on whether the sequence should move forward or backward in time.
- 3. Set the count and separator. Enter How many dates to generate and a Separator such as a newline or comma. Month and year steps clamp to the shortest month, so stepping from Jan 31 by a month lands on Feb 29 or 28.
- 4. Copy the generated list. Copy the finished list of dates from the output pane and paste it wherever the sequence is needed, from a test fixture to a scheduling spreadsheet.
When to use Generate a Date Sequence
Generate a Date Sequence builds an ordered list of calendar dates stepped by days, months or years from a starting point. It replaces manually typing out recurring dates or writing a throwaway script for something a form field can do.
- Filling a recurring billing schedule. A subscription renews on the 31st of each month where possible. Step monthly from the signup date and see exactly how the clamped dates land in shorter months like February.
- Seeding test fixtures with realistic dates. An automated test needs a column of consecutive daily dates to populate a mock database. Generate the sequence with a comma separator and paste it straight into the fixture file.
- Building a list of annual anniversary dates. You want the next ten anniversaries of a founding date for a roadmap slide. Step yearly from the original date and copy the resulting list into the presentation.
- Mapping out a weekly check-in cadence. A project calls for a check-in every 7 days starting from kickoff. Set the step to 7 days and generate enough dates to cover the whole project timeline at once.
Examples
Monthly from Jan 31 (clamps short months)
Output
2020-01-31 2020-02-29 2020-03-31
About the Generate a Date Sequence tool
Generate a Date Sequence does its work locally, right in the browser. Step a calendar date up or down by days, months or years. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the Time Tools collection on EditSafely, a set of 90 small, focused Time utilities that share the same instant, private workspace.
You can shape the output with 6 settings, including Start date, Step amount, Step unit and Direction, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Is Generate a Date Sequence free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Does the generator send anything to a server?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How do I get a different result?
Run the generator again. Each run is computed fresh on your device, and any options you change are applied to the next result immediately.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.