Add option to select between date formats

[Copilot]

This PR adds the ability to select between different date formats in both the CLI and web interface.

New features:

Date formatting utility:

• Added a formatDate function to weeknumber.js that supports ISO, US, and EU date formats
• ISO format: YYYY-MM-DD (default)
• US format: MM/DD/YYYY
• EU format: DD/MM/YYYY

CLI enhancements:

• Added a -f, --format option to specify the date format
• Default is ISO format
• Updated output to show both week number and formatted date
• Added examples to help documentation

# Show current week number with ISO date format
npx @hopefullyworks/week-number

# Show current week number with EU date format
npx @hopefullyworks/week-number -f EU

Web interface improvements:

• Added a dropdown to select between different date formats
• Shows both the week number and the formatted date
• Added support for 'format' URL parameter to set format on page load
• Updates URL when format is changed

Example URL with custom date and format:

https://week-number.herokuapp.com/?date=2023-06-22&format=EU

Documentation:

• Updated README.md with details about the new functionality
• Added usage examples for both CLI and web interface

All tests are passing, including new tests to verify the date formatting functionality.

Fixes #79.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
week-number	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 26, 2025 7:34am