Planetary Cartography & Meridians
Interactive World Time Zone Map
Each 15° band of longitude represents approximately one solar hour. Click or hover any longitudinal band below to inspect current regional clocks, offsets, and canonical cities.
Interactive 24-Hour Planetary Bands
Select a Longitudinal Time Zone Band
Hover or click any longitudinal slice to inspect time zones
Current Local Time in Band
Greenwich Mean Time (GMT/UTC)
Standard Offset: UTC +0 • Ref: Europe/London6:04:49
Thursday, September 17, 2026Daylight Saving StatusDST Active
Major Cities & Time Zones in UTC +0
12 canonical zones listedCoordinated Universal Time (UTC)UTC
UTC +0AbidjanAfrica/Abidjan
UTC +0AccraAfrica/Accra
UTC +0BamakoAfrica/Bamako
UTC +0BanjulAfrica/Banjul
UTC +0BissauAfrica/Bissau
UTC +0ConakryAfrica/Conakry
UTC +0DakarAfrica/Dakar
UTC +0FreetownAfrica/Freetown
UTC +0LomeAfrica/Lome
UTC +0MonroviaAfrica/Monrovia
UTC +0NouakchottAfrica/Nouakchott
UTC +0The 15° Meridian Principle
Because the Earth completes a 360-degree rotation once every 24 hours, the surface of the globe is geometrically partitioned into 24 standard meridians, each spaced 15 degrees of longitude apart.
Prime Meridian & UTC Anchor
Coordinated Universal Time (UTC) is anchored at 0° longitude running through the Royal Observatory in Greenwich, London. Eastward meridians add hours (UTC+), while westward meridians subtract hours (UTC-).
International Date Line (IDL)
Located roughly around the 180° meridian in the Pacific Ocean, crossing the International Date Line shifts the calendar date forward or backward by an entire 24-hour cycle.
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Quick access to international capitals, timezone offsets, chronometry tools, and horology guides
Precision Horology & Global Time Tools
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Live atomic clocks across all US time zones and Washington D.C.
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Precision digital chronometer with seconds and atomic reference
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Accurate Analog Clock
Smooth sweeping second hand and Swiss watch dial
552 Timezone Converters
Visual timeline converter across 552 global timezone pairs
Date Difference Calculator
Exact days, weeks, months & business days between dates
Date Calculator
Add or subtract days, weeks, months & business days
Golden Hour Calculator
Exact photography lighting, blue hour & civil twilight times
Sunrise & Sunset Times
NOAA algorithm solar dawn and dusk times worldwide
Moon Phases & Illumination
Live lunar surface illumination % and 29.5-day synodic cycle
Interactive World Time Map
Real-time solar terminator, day/night zones & 46 live clocks
400+ Time Zones Directory
Complete canonical IANA database with live ticking clocks
Interactive Timezone Map
Live global clock bands with clickable UTC offset zones
World Cities Directory
Current local time and population across global metropolises
Today's Date Details
Day of year, ISO week, Julian day & year progress percentage
ISO Week Number Calculator
Current ISO week number, calendar quarters & weeks remaining
ISO 8601 String Parser
Parse, validate and format ISO-8601 date-time strings
Unix Timestamp Converter
Epoch seconds converter to human readable UTC & local time
Astronomy & Twilight Lab
Sunrise, sunset, golden hour & moon phase calendar
International Dialing Codes
Country calling codes & smart calling hour guide
Multi-Clock World Wall
Trading floor kiosk with Swiss analog & digital dials
Flight & Jet Lag Calculator
Travel time & circadian light adjustment protocol
Online Alarm Clock
Fullscreen bedside display with Web Audio chimes
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Overlap working window across 4+ global hubs
Team Overlap Calculator
Mutual working hours matrix for remote teams
Business Days Calculator
Working days between dates & 90-day deadlines
Birthday & Age Countdown
Weeks, days & exact chronological age tracker
Time Difference
Instant hour comparison matrix
Atomic Clock Accuracy
NTP drift latency benchmark
Unix Timestamp Studio
Epoch seconds converter & 2038 lab
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Global spring forward & fall back dates
Horology Learning Academy
Deep dive into UTC, leap seconds & chronometry
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