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Excel Formula: Convert Date to Julian

Author: Sun Last Modified: 2020-09-07

doc convert date to julia 1

Sometimes, you need to convert the standard date to the Julian date in Excel, here this article introduces a formula which combines the TEXT, YEAR and DATE functions to solve this job.

If you want to follow along with this tutorial, please download the example spreadsheet.
doc convert date to julia 1

Generic formula:



Date: the date you want to convert to Julian date.

Return Value

This formula returns a Julian date in a text(yyd) format. First two digits represent the two-digits year, the else numbers represent the number of days.

How this formula work

A list of dates are in cell B3:B6, to convert them to Julian date, please use below formula:


Press Enter key, then drag autofill handle down to apply this formula.
doc convert date to julia 1


TEXT function converts a number to a text in a specific format. As we know, the date is stored as a number in Excel, here the TEXT function converts the date to text in the yy format.

YEAR function gets the year from a date.

DATE function combines year, month, and day numbers from separate cells to a valid date. Here the formula

  • DATE(YEAR(B3),1,0)
  • =DATE(2020,1,0)
  • =12/31/2019

Tip: if the day number is less than 1, it will subtract absolute number of days from the first day of the month.

  • B3-(DATE(YEAR(B3),1,0))
  • =3/12/2020-12/31/2019
  • =72


If you want to get the Julian date in 4-digit year and 3-digit day number, please use below formula

doc convert date to julia 1

Relative Formulas

Relative Functions

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