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Inspector time/timezone

Timezone Converter

Overview

This timezone converter works like a world-clock board: set one reference time — the live ticking clock or any custom date and time in your home zone — and every zone you add instantly shows its local time, whether it is today or tomorrow there, and its exact offset with automatic daylight-saving-time handling. A live world map shades the regions that are in night right now and marks where the sun is overhead, while each zone carries a daylight bar you can expand for local sunrise, sunset, golden-hour and moon-phase details. All calculations run client-side in your browser — no coordinates, dates, or timezone queries are ever sent to a server.

Scheduling International CallsProfessionals coordinating meetings across continents can enter a proposed time in their local timezone and immediately confirm the equivalent hour for each participant.
Remote Team Overlap PlanningDistributed teams use the day/night map to visually identify which working hours overlap across multiple cities before picking a meeting window.
Travel Itinerary VerificationTravelers verify arrival and departure times in destination timezones — including DST transitions — without relying on a network connection.
Golden Hour Photography PlanningPhotographers add a target city to the board and expand its daylight bar to get exact golden-hour start and end times before heading out.
Historical and Future Date ConversionsResearchers or journalists convert times for past or future dates and get the correct offset, accounting for historical DST rules for that specific date.

Key features

Compare one moment across as many timezones as you like on a single board
Live reference time that ticks, or pin any custom date and time
Set your home zone from a searchable city list or via one-click geolocation
Each zone shows its local time, day offset (today/tomorrow), and UTC offset
Live world map shading current day and night regions with your zones marked
Compact daylight bar per zone, expandable to full sunrise, sunset and golden-hour times
Moon phase and illumination for every zone
Automatic daylight-saving-time handling for accurate offsets on any date
Your zone list and preferences are remembered between visits

Set

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Specification

Command: time.timezone
Set: Time
Input: text
Output: —
Max file: no limit
Batch: single file

Runtime

Engine: Intl.DateTimeFormat
Threads: single
Isolated: —
WebGPU: —
Memory: —

Transport 0 B

The file is opened, worked on and written back inside this tab. No upload step exists in this tool — there is nowhere for the bytes to go.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

How it works

Set your reference time

Leave it on the live ticking clock or pin a specific date and time, then pick your home zone from the searchable city list or with one-click geolocation.

Add the zones you care about

Search and add any timezone to the board. Each one instantly shows its local time, whether it is today or tomorrow there, and its offset from your home zone.

Read the day, night and sun data

The world map shades where it is night right now, and every zone has a daylight bar you can expand for exact sunrise, sunset, golden-hour and moon-phase details.

Frequently asked

How accurate are the timezone conversions?

Our timezone conversions are highly accurate and account for daylight saving time (DST) changes automatically. We use the latest timezone database to ensure precision.

Can I see sunrise and sunset times for a zone?

Yes. Every zone on the board has a compact daylight bar, and expanding it reveals local sunrise, sunset, solar noon, day length, golden-hour windows, and the current moon phase — all calculated from the zone's coordinates and your reference date.

What does the day/night map show?

The world map shades the regions that are in night at your reference moment, and a marker shows where the sun is directly overhead. Your selected zones are pinned on the map so you can see at a glance who is in daylight.

Is my location data stored or tracked?

No, all timezone calculations and location processing happen in your browser. We don't store or track any location information. Your zone list is saved only in your own browser's local storage.

How many timezones can I compare at once?

As many as you like. Add any zone from the searchable list to the board and it is instantly converted from your home zone; remove zones or change your home zone at any time and your setup is remembered for next time.

Does the tool work for historical dates?

Yes, you can convert times for any date, and the tool will account for historical daylight saving time rules and timezone changes for that specific date.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

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