A super-simple GitHub Actions tool that instantly converts your meeting time into major cities worldwide — perfect for scheduling international calls without doing time-zone math!

No installation · No dependencies · Just click and run.

Just go to the Actions tab and run it: → https://github.com/kangwonlee/timezone-table/actions/workflows/meeting-time.yml

1. Click on the Actions tab

2. In the left sidebar, select Meeting Time Converter

3. Click the blue button Run workflow (top-right)

4. Fill in the form:

   • Year – e.g. 2026 (leave empty for current year)
   • Month – 1 to 12 (leave empty for current month)
   • Day – 1 to 31 (leave empty for today)
   • Hour – 0–23 (24-hour format)
   • Minute – 0–59
   • Timezone – IANA name of the original time (default: Europe/Paris) Common examples: Europe/Paris, Europe/London, America/New_York, America/Los_Angeles, Asia/Tokyo, Asia/Dubai, etc.
   • Duration – meeting length in minutes (default: 60)
   • Generate 24-hour XLSX – true or false (default: false) to generate an optional 24-hour timezone table in Excel format

5. Click the green Run workflow button (may take about 15 seconds)

The result appears immediately in the workflow run summary as a beautiful Markdown table:

Original time: 2026年01月15日 14:00 CET (Europe/Paris) Duration: 60 minutes

You can copy-paste the table directly into Slack, Notion, emails, etc.

If you enable generate_xlsx: true, the workflow generates an Excel file showing the full 24-hour day in the original timezone, converted to each city's local time.

• Colors: Green for typical working hours (9:00–17:00 local), gray for sleep hours (22:00–7:00 local).
• Download: After the workflow completes, go to the run page, scroll to the "Artifacts" section at the bottom, and download 24hour_timezones_{day}.

This is great for visualizing availability across timezones for the entire day.

• Cities: The tool uses the list from cities.json. Fork the repo and edit this file to add/remove cities (format: {"city": "City Name", "timezone": "IANA/Timezone"}).
• Sorting: By default, cities are in the order listed. To sort west-to-east (by UTC offset), edit the workflow YAML to add --sort-by-offset to the uv run command.
• More Options: See timezone_table.py for additional features like handling ambiguous DST times.

Versions before v0.2.0 have incorrect DST/summer-time handling. Duration arithmetic used wall-clock time instead of real elapsed time, producing wrong meeting end times across spring-forward and fall-back boundaries. The 24-hour XLSX table also generated phantom rows for non-existent gap times. Please use v0.2.0 or later.

• Python + built-in zoneinfo
• Powered by uv – fast Python dependency management
• Pure GitHub Actions – zero setup

Just fork, star, or reuse in your own team/org repo!

Made with ❤️ for distributed teams.

(Got help from Grok 4 by xAI)