Add timezone converter utility for remote team scheduling

[devin-ai-integration]

Add timezone converter utility for remote team scheduling

Summary

Adds a new timezone converter utility designed for remote software teams who need to schedule syncs across timezones. Users can select a source timezone, input a time and date, and see the converted times across 13 common timezones (US, Europe, Asia, Australia). The tool auto-detects the user's timezone on load and allows toggling which timezones to display.

Key feature: Shareable URLs - the URL automatically updates with query params (time, date, tz) so users can share links like /utilities/timezone-converter?time=15:30&date=2025-12-03&tz=America/Los_Angeles and recipients can see the time converted to their timezone.

Files added:

• pages/utilities/timezone-converter.tsx - Main page component with time/date inputs and timezone selection
• components/utils/timezone-converter.utils.ts - Conversion logic using the Intl API
• components/seo/TimezoneConverterSEO.tsx - SEO content with usage instructions and code examples
• Modified components/utils/tools-list.ts to add the new tool to the homepage

Updates since last revision

• Added shareable URL query params (time, date, tz) that update automatically as user changes inputs
• Added "Copy Link to Share" button for easy sharing
• Fixed Prettier formatting in TimezoneConverterSEO.tsx

Review & Testing Checklist for Human

• Test shareable URL feature - Set a time (e.g., 3:30 PM PT), copy the URL, open in incognito/new browser, verify it loads with the correct time and timezone pre-filled
• Test URL encoding - Verify timezones with slashes (e.g., America/Los_Angeles) are properly encoded/decoded in URLs
• Test timezone conversion accuracy - Verify conversions are correct by comparing against a known timezone converter (e.g., timeanddate.com). Pay attention to DST differences.
• Test date boundary crossings - Input a late evening time and verify that timezones ahead correctly show the next day
• Verify UI on mobile - The 2-column grid for timezone checkboxes may need review on smaller screens

Recommended test plan:

1. Navigate to /utilities/timezone-converter
2. Verify your local timezone is auto-detected
3. Input a known time (e.g., 9:00 AM New York) and verify London shows 2:00 PM (or 1:00 PM depending on DST)
4. Click "Copy Link to Share" and open the URL in a new tab - verify it loads with the same time/date/timezone
5. Toggle some timezones off and verify they disappear from results
6. Test the "Copy to clipboard" button for copying converted times

Notes

• The offset field in TimezoneInfo interface and getTimezoneOffset/getCurrentTimeInTimezone functions are exported but unused - could be cleaned up or may be intended for future use
• No unit tests were added for the conversion logic or URL param handling
• An eslint-disable comment was added for the URL sync useEffect to avoid infinite loops with router dependency

Link to Devin run: https://app.devin.ai/sessions/aeb0c23621584cedb74fb8edb171cb83
Requested by: dani@jam.dev (dani@jam.dev) (@danigrant)

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