Tools in This Collection
Guides & Articles
Tracking the Sun and Coordinating Time Across the Globe
Two of the most practical geography-related calculations for everyday life are knowing where the sun will be at a given time and place, and knowing what time it currently is in cities around the world. These tools handle both with the precision needed for professional use cases — photographers planning golden hour shots, architects designing solar-optimized buildings, and remote teams coordinating across multiple time zones.
Sun Position: Where Will the Sun Be?
Knowing the exact position of the sun at a specific time and location is critical for several professional applications. Landscape and architecture photographers plan golden hour shoots around sun position — golden hour occurs roughly 30-60 minutes before sunset when the sun is below 10° elevation and light is warm and directional. The exact time varies by location and season: in New York, golden hour in summer starts around 7:30 PM, but in winter it starts around 3:30 PM. In Los Angeles, the times shift accordingly, and the angle of light is more southerly in winter versus more overhead in summer.
The Sun Position Calculator returns the following for any location, date, and time: azimuth (compass direction the sun is in, expressed in degrees), elevation (degrees above the horizon), as well as astronomical event times including astronomical dawn, nautical dawn, civil dawn, sunrise, solar noon, sunset, civil dusk, nautical dusk, and astronomical dusk. These distinctions matter for photographers: civil twilight (sun 0-6° below horizon) is the golden/blue hour period; nautical twilight (6-12° below) provides ambient light for shooting silhouettes; astronomical twilight (12-18° below) is when the sky is just dark enough for astrophotography.
For solar panel installers and architects, the tool provides panel tilt and orientation data: for a fixed solar installation at a given latitude, the optimal tilt angle is approximately equal to the latitude, and the optimal orientation is due south in the northern hemisphere (due north in the southern hemisphere). The calculator shows the sun's path across the sky throughout the day to help identify any obstructions — nearby trees or buildings — that might shadow panels at certain times.
Time Zones: Coordinating Across Continents
Remote work has made time zone coordination a daily reality for millions of people. The challenge isn't just knowing what time it is in another city — it's finding the window where working hours overlap for meetings, calls, or collaborative work. A team with members in San Francisco (UTC-8), New York (UTC-5), London (UTC+0), and Berlin (UTC+1) has only a 1-2 hour overlap window where everyone is in business hours at the same time: roughly 2-4 PM in London (9 AM-11 AM San Francisco time, 2 PM-4 PM London, 3 PM-5 PM Berlin).
The Travel Time Zone Planner accepts multiple cities and shows a visual timeline of the day with shaded working hours for each location, making the overlap window immediately visible without calculation. The World Clock Dashboard shows the current local time in multiple cities simultaneously, with automatic daylight saving time adjustment so you don't have to manually calculate DST transitions. Both tools include a comprehensive city database covering hundreds of major cities worldwide.
Frequently Asked Questions
What is golden hour in photography?
Golden hour is the period roughly 30-60 minutes before sunset (and after sunrise) when the sun is below 10° elevation. Light during this window is warm in color, soft in quality, and creates long directional shadows — ideal conditions for landscape, portrait, and architectural photography. The exact time varies by location and season. Use the Sun Position Calculator to find the exact golden hour window for your location and date.
What is the difference between civil, nautical, and astronomical twilight?
Civil twilight: sun is 0-6° below the horizon. The sky is still bright enough to see and photography is often excellent. Nautical twilight: sun is 6-12° below. The sky is dark blue; horizon is still visible at sea. Astronomical twilight: sun is 12-18° below. The sky is nearly dark enough for astrophotography. After astronomical twilight ends, it's true astronomical night.
What is solar noon?
Solar noon is the moment when the sun is at its highest point in the sky for a given day and location — directly on the north-south meridian. It's not always 12:00 PM on your clock, because clocks are set to time zone standards that can put you far from your actual solar noon. The Sun Position Calculator shows the exact solar noon time for any location and date.
How do I find a meeting time that works across multiple time zones?
The Travel Time Zone Planner shows business hours (typically 9 AM-6 PM) for each selected city as colored bars on a shared timeline. The overlap of all bars is the window where everyone is within working hours. Add your cities, and the tool highlights the best windows for scheduling. For quick current time lookups, the World Clock Dashboard shows live times across multiple cities at once.
Does the World Clock Dashboard handle daylight saving time automatically?
Yes. The World Clock Dashboard automatically applies the current daylight saving time status for each city. During periods when some regions observe DST and others don't — such as the weeks when the US has switched but Europe hasn't — the displayed times reflect the actual current local time including DST adjustments.