Convert Timestamp to Months

If you’re working with timestamps and need to convert them into whole months, this tool makes it effortless. The Convert Timestamp to Months tool takes a wide range of real-world datetime formats and calculates how many total months have passed since the Unix epoch January 1970.

It supports all the formats you’re likely to come across: ISO 8601 datetimes, timecodes, and even natural-language entries like July 28, 2025 12:30. For any timestamp with a full date, it converts using a simple formula: (year - 1970) * 12 + month. That means January 1970 returns 0, February 1970 returns 1, and so on. It ignores time and day parts entirely, giving you just the calendar month total based on UTC.

Everything updates live in your browser as you type or paste. The tool works locally and doesn’t send your data anywhere. It also gives you full control over formatting options, live output, copy/export features, and more all built in.

How to Use:

Paste your timestamps line by line into the Input Timestamp field. The tool supports formats like 1970-01-01 00:00:00, 2024-01-01T12:00:00Z, and July 28, 2025. It will ignore purely time-only inputs like 00:45:00 because they don’t contain a date.

Use the Trim input lines toggle to remove extra spaces from each line automatically. This is on by default and helps with copy-pasted lists. If your input includes bad or partial timestamps, enable Ignore invalid timestamps to skip them silently. Otherwise, invalid lines will show as Invalid in the output.

Want more space to work? Use Maximize output to expand the results pane. The output area updates instantly and flashes blue when changed. Click Convert if you want to trigger a manual refresh.

To save results, click Export to File. For copy/paste, click Copy Output — the button briefly shows “Copied!” and resets automatically. You can also import lists via the Choose File button, which supports safe text-based formats like .txt, .csv, .log, .json, and more.

Click Clear All to reset input, output, filename display, toggles, and counters.

What Convert Timestamp to Months can do:

This tool calculates how many calendar months have passed since the Unix epoch for any valid timestamp that includes a year and month. It’s designed for data pipelines, logs, archival indexing, or any workflow where you want to bucket time by month instead of exact seconds. By normalizing everything to UTC, it ensures that timezones never skew your results.

It’s especially useful when grouping records or slicing metrics by month. If you give it something like 2024-01-01, it returns 648 meaning it’s 648 months after January 1970. And because it skips days and times entirely, the output is simple and consistent no matter the time of day.

You get live updates, robust input handling, and full file support all without leaving the browser. It’s fast, private, and built for real-world data formats.

Example:

Here’s a mix of timestamp formats converted to total months since the Unix epoch. All of these are treated as UTC and based solely on year and month.

Input:

1970-01-01 00:00:42
2024-01-01T00:00:00Z
July 28, 2025 12:30
00:45:00

Output:

0
648
667
Invalid

Convert Timestamp to Months Table:

This table shows common timestamps and how many total months they represent since 1970-01.

Common Use Cases:

This tool is ideal for grouping logs, bucketing activity, tracking trends, or converting large datasets into month-based periods. If you work with time-series data, historical indexing, or even billing cycles you’ll use this a lot. It just works.