World Clock — Track Local Times Across Every City

World Clock Widget: Fast World Time & Meeting Planner

What it is

A compact, quick-loading tool that shows current times for multiple cities or time zones and helps plan meetings across zones.

Key features

Live times: Real-time clocks for selected cities with automatic daylight saving adjustments.
Quick add: Add cities by name, country, or time-zone code.
Meeting planner: Pick a proposed time and see local times for all participants; highlights suitable meeting windows.
Time conversion: Convert a specific timestamp between any two zones.
Widgets & compact views: Small on-screen widgets (e.g., desktop, phone, browser toolbar) showing chosen clocks.
Notifications: Optional alerts for upcoming meetings in local time.
⁄₁₂-hour toggle: Display in 24-hour or AM/PM format.
Offline fallback: Cached times based on last sync if temporarily offline (with clear warning).

Typical UI layout

Top: search/add city input and timezone selector.
Main: horizontal or grid list of clocks (city name, local time, date, UTC offset).
Sidebar/Modal: meeting planner with timeline slider and suggested meeting windows.
Compact mode: single-line widget showing selected city pair and quick-convert button.

Usage examples

Compare New York, London, and Tokyo instantly to find a 9–11am NZ meeting window.
Convert “March 10, 14:00 CET” to PST and IST for invite clarity.
Set a widget for your team’s primary city to get a glanceable reminder of their local time.

Implementation notes (developer-oriented)

Source time zone data from the IANA tz database and apply updates regularly.
Use server-side UTC authoritative time with client adjustments for latency.
Handle DST rules per zone; include fallback mappings for legacy zone names.
Respect minimal permissions: widget should not require location unless used to auto-detect local zone.

Best practices for users

Keep a small set of frequently used cities pinned.
Use the meeting planner’s highlighted windows to propose times in calendar invites.
Enable 24-hour format if scheduling across many zones to avoid AM/PM confusion.