Product definition
Scoped the build around one practical question: what time and date will this meeting be for each person?
Open Source / Time Zones / Daily Build
Timezone Pair
/ Overview
A dependency-free meeting-time converter that pairs two IANA time zones, catches daylight-saving gaps and maps shared working hours.
Coordinating across regions requires more than subtracting a fixed offset: daylight-saving changes and date boundaries can make a proposed meeting ambiguous or invalid.
/ Provided servicesClear thinking.
Clear thinking.
Practical delivery.
Interface design
Designed a responsive neo-brutalist workspace with clear paired results, date-shift feedback and a scannable schedule.
Engineering
Separated time-zone conversion, working-hour labels and daily pairing into testable JavaScript modules.
/ Solution
I built a local browser tool that converts a chosen wall-clock time between two IANA zones, rejects nonexistent daylight-saving times and lays out a complete day with shared 9:00–17:00 hours highlighted.
/ Impact
IANA time-zone conversion
Daylight-saving gap validation
24-hour overlap mapping
Five passing logic tests
JavaScript & Intl
Uses Intl.DateTimeFormat with IANA identifiers to resolve local wall times without an external date library.
HTML & CSS
Semantic form controls, accessible feedback and a responsive paired-time layout with no runtime dependencies.
Node test runner
Five tests cover zone validation, cross-date conversion, daylight-saving gaps, work bands and the 24-hour schedule.