How to convert between Julian date and calendar date in Excel?
Generally, Julian date is a date format which includes 5 digit numbers, first two indicate the year, and last three indicate the day of the year. For example, 14001 indicates 1/1/2014 in calendar. Now this tutorial is talking about the methods on conversion between Julian date and calendar date in Excel.
Convert Julian date to calendar date
Convert calendar date to Julian date
Convert Julian date to calendar date
To convert Julian date to calendar date, you just need a formula in Excel.
1. In a blank cell, type this formula =DATE(IF(0+(LEFT(A1,2))<30,2000,1900)+LEFT(A1,2),1,RIGHT(A1,3)) into it, press Enter key, if you need, you can drag the fill handle to a range with this formula. See screenshot:
Tip: A1 indicates the Julian date you need to convert to calendar date.
2. Then right click at these highlighted cells, and select Format Cells from context menu, and in the popped out Format Cells dialog, under Number tab, click Date in the Category list, then select the date type you need in the right section.
3. Click OK, then you can see all Julian dates have been converted to calendar dates.
Convert calendar date to Julian date
If you want to convert calendar date to Julian date, you can use below formulas.
In a blank cell, type this formula =TEXT(A1,"yy")&TEXT((A1DATEVALUE("1/1/"&TEXT(A1,"yy"))+1),"000") and press Enter key, if you need you can apply this formula to a range by dragging the auto fill handle.
Tip: A1 is the calendar date you want to convert to Julian date.
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 Convert time string to time or date and time in Excel
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