Mt. Rainier from Paradise, on the south side of the park


Julian Date Calculator
 Converts a UTC Timestamp to a Julian Date

Julian dates assign a unique number to each calendar day. The Julian day number counts the number of days since noon on January 1, -4712 (astronomical calendar) or January 1, 4713 BC (civil calendar). This system, widely used by astronomers, was proposed by Julius J. Scaliger in 1583. Hours and minutes are counted as fractions of a day since the last noon (Universal Time). I have created a php calculator that determines the julian date value. Enjoy!


The Julian Date for Saturday, November 22, 2008, 6:41:30 AM UTC is:

2454792.77882


Figure out a Julian Date
** The following MUST be in UTC/Zulu/GMT time to be right **
Month: Day: Year:
Hour: Minute: Second:



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