“Earth’s rotation relative to the Sun produces global time, the day–night cycle, and calendar date progression.”
— NASA Science
“On the Natural World Clock™, you can watch these events happen live around the world.”
Quick Start Guide
Orientation (vertical view of Earth’s Equatorial Plane facing the Sun)
Noon at the top
Midnight at the bottom
Time is read: (Direction of Earth's rotation)
Upward from Midnight to Noon (AM)
Exact time: Minutes and seconds box
Downward from Noon to Midnight (PM)
Location Boxes
Show the UTC longitudinal span
Red box indicates the user’s location
Black or white boxes divide the Eastern and Western Hemispheres at 0° and 180°
Display multiple international cities/locations
Arrowheads
Point to the time on the Ring of Time
Color indicates the day and date
Display standard meridian degrees and UTC offset
Day / Date Change
Arrowhead color changes from Date 1 to Date 2 when it reaches Midnight
Automatically adjusts for Daylight Saving Time (DST)
Calendar Boxes
The left box shows the color of Date 1
The right box shows the color of Date 2
The next date begins when 180°E (Fiji) reaches Midnight
Ready to Explore?
Open the live Natural World Clock™ and see global time in motion.