Julian Date Converter

Convert between Gregorian calendar dates and Julian Day Numbers (JD). The Julian Date is a continuous count of days since the beginning of the Julian Period on January 1, 4713 BC.

Result

JD: 2461189.000000

Julian Day Number: 2461189

Day of Year: 148

About Julian Dates

The Julian Date (JD) is a continuous count of days since the beginning of the Julian Period on January 1, 4713 BC (Julian calendar) at noon Universal Time. It is used primarily by astronomers and is convenient for calculating elapsed days between two events. The Julian Day Number (JDN) is the integer part of the Julian Date.

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Editorial Note

MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: Standard Mathematical References

by Various

🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.