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Accurately calculate sunrise and sunset times, as well as daylight hours, for any location worldwide. Supports 30 years of historical data.
Look up dawn, sunrise, zenith, sunset, and dusk for a given city.
Enter a city to see sunrise and sunset times.
Expiration Date Calculator
Calculate the expiration date based on the production date and shelf life, or check the near-expiry and expired status based on the expiration date.
Baby 100 Days Calculator
Calculate the exact Gregorian and Lunar dates, along with the day of the week, for your baby's 1-month, 100-day, and 1-year milestones based on their birth date.
Android Permission Lookup & Reference Guide
Provides developers and users with instant plain English names and functional descriptions for standard Android permission strings.
JSON to Ruby Class Converter
Automatically convert JSON data into Ruby class definitions. Generate code with properties and initialize methods for seamless integration into your Ruby projects.
Expiration Date Calculator
Calculate the expiration date based on the production date and shelf life, or check the near-expiry and expired status based on the expiration date.
Baby 100 Days Calculator
Calculate the exact Gregorian and Lunar dates, along with the day of the week, for your baby's 1-month, 100-day, and 1-year milestones based on their birth date.
Android Permission Lookup & Reference Guide
Provides developers and users with instant plain English names and functional descriptions for standard Android permission strings.
JSON to Ruby Class Converter
Automatically convert JSON data into Ruby class definitions. Generate code with properties and initialize methods for seamless integration into your Ruby projects.
Age Calculator
Enter your birth date to instantly calculate your exact age, traditional Chinese age, and total days alive, plus find your Chinese zodiac, horoscope, and lunar birthday.
Planning an outdoor activity but don't know the exact sunrise time? Based on the NOAA Solar Calculator astronomical algorithm, this tool accurately calculates the sunrise, sunset, solar noon, and daylight hours for a specific date by entering a city name or latitude/longitude coordinates. Daylight hours refer to the actual daytime between sunrise and sunset, including atmospheric refraction correction (standard value 0.833°), ensuring a calculation error of ≤±60 seconds.
When using decimal latitude and longitude, the latitude range is -90 to +90, and the longitude range is -180 to +180. It is recommended to keep 4 decimal places. Please use standard geographical names for cities (e.g., "Guangzhou") and avoid abbreviations to prevent matching errors. The results default to your browser's time zone; if you need a fixed time zone, please set it before calculating.
For photography enthusiasts, we recommend paying special attention to the "Civil Dawn" and "Civil Dusk" times (when the sun is 6° below the horizon), which are the best times for capturing the golden hour. Typical input/output example: Input "Shanghai 2024-12-21", output sunrise 06:50, sunset 16:59, daylight 10 hours 9 minutes, intuitively demonstrating the short daylight characteristics of the winter solstice.
