vClock Date Converter

Convert between Gregorian, Julian, Hijri, Unix Timestamp & Multiple Date Formats

6+ Calendar Systems | Instant Conversion
Select Conversion Type
Gregorian Date
Time (Optional)
Conversion Results

Select a date and click convert to see all formats

Quick Presets
Today
Yesterday
Tomorrow
New Year 2025
Christmas
Eid al-Fitr
Ramadan Start
Current Unix
Gregorian Calendar
Standard international calendar system
Julian Day Number
Astronomical continuous day count
Hijri Calendar
Islamic lunar calendar system
Unix Timestamp
Seconds since January 1, 1970

Frequently Asked Questions

What is a Julian Day Number?
Julian Day Number (JDN) is a continuous count of days since January 1, 4713 BC. It's used by astronomers and for calculating dates across different calendar systems.
How accurate is the Hijri conversion?
Our Hijri conversion uses astronomical calculations based on lunar cycles. It's accurate for most dates, though actual Islamic dates may vary based on moon sighting.
What is Unix timestamp?
Unix timestamp is the number of seconds that have elapsed since January 1, 1970 (UTC). It's widely used in programming and computer systems.
Can I convert historical dates?
Yes! Our converter works for dates from 4713 BC to 9999 AD using accurate astronomical calculations.
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Date Converter Pro - Convert Between Multiple Calendar Systems

Our professional date converter supports Gregorian, Julian Day Number, Hijri (Islamic), and Unix timestamp conversions. Perfect for astronomers, developers, historians, and anyone working with different calendar systems.

Features: Gregorian to Hijri conversion, Julian Day Number calculator, Unix timestamp converter, multiple date formats, and instant conversion results.