All tools › A run of dates
Timestamp sequence
Unix times at a chosen step, for test data and scripts.
It runs entirely in this browser tab: what you type is never uploaded, and the tool makes no network request while it works. Open your browser's network panel and try it — nothing leaves the page. There is no sign-up and no account.
Settings
- How many
- How many rows the column has. A number from 1 to 1000.
- Every
- Seconds between one timestamp and the next. A number from 1 to 100000.
- Which columns
- Seconds, milliseconds, an ISO string, or all three. Choices: Seconds, Milliseconds, ISO 8601, All of them.
- Month before day
- Only for a date like 03/04 — a four-digit year first is never ambiguous.
How to use it
- Paste your text into the box above, or open a file.
- Adjust the settings beside it until the result is what you wanted.
- Copy the result, or save it as a file. The result updates as you type.
Questions
- Is 03/04/2024 the third of April or the fourth of March?
- Both, and no parser can tell. Every tool that reads a date has a setting for the order, and a four-digit year first is never ambiguous whatever the setting says. The format converter goes further: it counts the dates in a column that can only be read one way, and warns when the column disagrees with itself.
- Are the public holidays accurate?
- They are rules rather than dates — a fixed day, an offset from Easter, or the nth weekday of a month — so they work for any year. They are not a legal source: holidays are moved, added and removed by decree, and regional ones are not here at all. Every result that uses them says so.
- Does it know about time zones?
- No, deliberately. A time-zone database is several megabytes, larger than this whole application, and it is revised several times a year — a stale copy would put a meeting an hour out for half of Europe every spring. The meeting planner takes offsets from you and says it knows nothing about daylight saving.
- Is what I type uploaded anywhere?
- No. This page carries the whole tool as WebAssembly and runs it on your own device. Nothing you type is sent anywhere.
Other tools for a run of dates
Date sequence
A column of dates at a chosen step, skipping what should be skipped.
Sprint dates
A run of sprints, each ending on a working day.
Shift rota
A rota from a pattern that repeats, with each person's tally.
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