Data Sources & Disclaimer

All sunrise, sunset, twilight, solar altitude, and azimuth values provided on this website are calculated using algorithms developed by the National Oceanic and Atmospheric Administration (NOAA) and corrected for elevation refraction offsets.

Please review our disclaimer terms:

• Recreational Use Only: Data is provided for photography planning, hiking, and general tourism purposes.
• No Critical Navigation: Under no circumstances should this data be used for marine navigation, aviation routing, surveying, or military operations.
• Weather Effects: The actual visibility of sunrises or sunsets depends on local cloud cover, air quality, and mountainous obstructions.