Staaarter

Generate a UNIX Time Sequence

Generates a sequence of UNIX timestamps starting from a given value, advancing by a fixed step in seconds (positive or negative), for a specified number of timestamps. A free online tool from Staaarter, right in your browser.

Runs locallyUpdated 2026-08-05
By Staaarter Team
generatortimestamp

Overview

Introduction

Test fixtures, sample datasets, and scheduling logic often need a run of evenly spaced timestamps rather than a single one-off value.

This tool generates exactly that: a start timestamp, a fixed step, and a count produce a clean list of UNIX timestamps in seconds.

What Is Generate a UNIX Time Sequence?

A UNIX time sequence generator that produces a list of timestamps starting at a given value and advancing by a constant step for each subsequent entry.

It's arithmetic, not randomness, every timestamp in the output is deterministically `start + i * step` for the i-th entry.

How Generate a UNIX Time Sequence Works

The three input lines (start, step, count) are each validated as whole numbers, with the count additionally required to be positive and within the 10,000 limit.

The sequence is built by adding `i * step` to the start value for each index from 0 up to count minus 1, then joined into a newline-separated list.

When To Use Generate a UNIX Time Sequence

Use it to seed test data or fixtures that need a predictable run of timestamps, such as consecutive log entries or scheduled job times.

It's also handy for generating hourly, daily, or custom-interval timestamp series without writing a script.

Often used alongside Convert UNIX Time to Human Time, Generate Random UNIX Time and Generate a Date Sequence.

Features

Advantages

  • Fully deterministic output, useful for reproducible test data.
  • Supports negative steps for descending sequences.
  • Generates up to 10,000 timestamps in one pass.

Limitations

  • Only produces evenly spaced sequences; irregular or randomized timestamps need Random UNIX Time Generator instead.
  • Capped at 10,000 timestamps per run.

Examples

Five hourly timestamps

Input

1770000000
3600
5

Output

1770000000
1770003600
1770007200
1770010800
1770014400

Starting at 1770000000 and stepping forward by 3600 seconds (one hour) for 5 total entries.

Best Practices & Notes

Best Practices

  • Use a step matching your real interval (60 for minutes, 3600 for hours, 86400 for days) to keep the sequence meaningful.
  • Convert a few entries with UNIX Time to Human Time Converter to sanity-check the sequence lands where expected.

Developer Notes

Each of the three lines is matched against `/^[+-]?\d+$/` (or `/^\d+$/` for count) before parsing with `Number()`; the sequence itself is a plain loop accumulating `start + i * step` as JavaScript numbers, so extremely large step/count combinations can exceed `Number.MAX_SAFE_INTEGER` and should be kept to realistic timestamp ranges.

Generate a UNIX Time Sequence Use Cases

  • Seeding test databases with a predictable series of timestamps
  • Generating hourly or daily timestamp checkpoints for a schedule
  • Producing sample data for charting or time-series demos

Common Mistakes

  • Putting the three values on one line instead of three separate lines, which the parser rejects.
  • Forgetting that count must be a positive whole number; a step can be negative but count cannot.

Tips

  • Feed the output straight into UNIX Time to Human Time Converter to review the sequence as readable dates.
  • Use a negative step to generate a descending sequence ending near a specific timestamp.

References

Frequently Asked Questions