Bridge the Gap Between Calendars
The Julian date system is a continuous count of days since noon Universal Time on January 1, 4713 BC. It's widely used in astronomy, geodesy, and other sciences to simplify calculations involving different calendar systems. Our Julian Date Converter provides a simple, two-way interface to translate between the familiar Gregorian calendar and the Julian Day Number (JD).
How It Works
The tool uses established astronomical algorithms to perform the conversion. When converting from Gregorian, it calculates the total number of days that have passed since the Julian epoch. When converting from a Julian Day Number, it reverses the process to find the corresponding Gregorian date and time.
Key Features
- Bidirectional Conversion: Convert from a Gregorian date and time to a Julian Day Number, or from a Julian Day Number back to a Gregorian date.
- Ordinal Day Display: When converting from Gregorian, the tool also shows the ordinal day of the year (e.g., February 1st is day 32).
- Precise Time: The conversion accounts for hours, minutes, and seconds, allowing for fractional Julian Day Numbers.
- Simple Interface: Switch between conversion modes with a single click and get instant results as you type.
How to Use the Julian Date Converter
- Step 1: Select Conversion Mode
Choose whether you want to convert "From Gregorian" to Julian or "From Julian" to Gregorian. - Step 2: Enter Your Data
If converting from Gregorian, use the date and time picker. If converting from Julian, type the Julian Day Number into the input field. - Step 3: View the Converted Value
The result of the conversion will appear instantly in the results section.
Find Our Tool
Julian Date Converter, Gregorian to Julian, Julian Day Number, JD Converter, Astronomical Date, Ordinal Date.