ZoneMap.live
I built this because I kept needing to answer "when is 3pm EST for my teammate in Singapore" and none of the existing tools felt right for me - they're mostly lists. I wanted a map where time differences are spatially obvious. A few things that were technically interesting to build: The day/night terminator. It's not just a shaded half-sphere. I implemented a simplified USNO solar declination algorithm, computing the subsolar point for a given UTC timestamp, then tracing the great-circle terminator and sampling which side each pixel falls on. It renders pixel-by-pixel onto a Canvas…
ZoneMap.live launched on February 26, 2026 with 6 votes, #1,572 of 16,627 launches that month and more than 75% of that year's launches.
What it does
Tired of ad-heavy timezone tools from 2005? ZoneMap is a free, modern world clock with a live day/night map. Drag it left or right to travel through time. Search 33,000+ cities, see working hours overlap instantly, and share your view via URL. No account, no ads, support PWA - just open and go.
Free world clock and timezone converter. Search 33,000+ cities, compare multiple timezones side-by-side, find team meeting overlap, and visualize the day/night boundary on a live world map. No account required.
ZoneMap is a free world clock and timezone converter. Compare real-time clocks across multiple cities simultaneously on an interactive world map with a live day/night boundary. No account required — works instantly in any browser. Tokyo is in Japan Standard Time (JST, UTC+9). Japan does not observe daylight saving time. Visit ZoneMap to see the exact current time in Tokyo alongside any other city. London observes GMT (UTC+0) in winter and BST (UTC+1) in summer. ZoneMap shows the current London time with automatic DST switching. New York is typically 5 hours behind London (EST vs GMT) or 4 hours behind during summer (EDT vs BST). Add both cities to ZoneMap and drag the timeline to any time…from zonemap.live
In the maker’s words, at launch
I built this because I kept needing to answer "when is 3pm EST for my teammate in Singapore" and none of the existing tools felt right for me - they're mostly lists. I wanted a map where time differences are spatially obvious. A few things that were technically interesting to build: The day/night terminator.…
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