How to Convert 7 Digit Julian Date to Calendar Date in Excel (3 Ways) (2024)

FAQs

How to convert 7 digit Julian date to calendar date in Excel? ›

To convert such serial number to date, all you have to do is change the cell number format. For this, simply pick Date in the Number Format box on the Home tab. To apply a format other than default, then select the cells with serial numbers and press Ctrl+1 to open the Format Cells dialog.

The 7-digit Julian date (yyyyddd) would be calculated as the number of days past (ddd) in that year (yyyy). If you are sure that the number is Julian date, then the code that you are using would give appropriate results.

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.

Select the cell or cells with serial numbers that you want to convert to dates. Locate the "Home" tab in the top right of the Excel window and click on it. Find the "Number Format" box in the toolbar that will usually say "General" or "Text." Click the down arrow next to the box and select "Date" from the menu.

The Julian date (JD) is a continuous count of days from 1 January 4713 BC (= -4712 January 1), Greenwich mean noon (= 12h UT1). For example, AD 1978 January 1, 0h UT1 is JD 2443509.5 and AD 1978 July 21, 15h UT1, is JD 2443711.125.

Right click on the column, format cells, number, custom. Choose the 0 type and put 7 zeros in the entry box and click okay. All numbers entered will be 7 digits.

Using Excel Functions to Convert Numbers to Dates

The DATE function can create a date from separate year, month, and day values. For an 8-digit number in the format YYYYMMDD, use the formula =DATE(LEFT(A1,4), MID(A1,5,2), RIGHT(A1,2)) to convert it to a date.

A Julian date is sometimes used to refer to a date format that is a combination of the current year and the number of days since the beginning of the year. For example, January 1, 2007 is represented as 2007001 and December 31, 2007 is represented as 2007365. Note that this format is not based on the Julian calendar.

How to read a 7 digit date code? ›

Find the year from the first 4 digits if the number has 7 digits. Some JD will show the full year in 4 digits for added clarity. For example, if it's a 7 digit number and the first 4 digits are 1997, then that corresponds to 1997.

The first two digits are the last numbers of the year and the three digits after the hyphen are the day of that year. So, for instance, a Julian date of 21-001 represents the first day of the year 2021, or January 1, 2021, while a Julian date of 22-165 represents the 165^th day of the year 2022 or June 14, 2022.

On the Home tab, click the popup window launcher next to Number. In the Category box, click Date, and then click the date format that you want in the Type list. To delete the serial numbers after all of the dates are converted successfully, select the cells that contain them, and then press DELETE.

Notes. Julian dates (abbreviated JD) are simply a continuous count of days and fractions since noon Universal Time on January 1, 4713 BC (on the Julian calendar). Almost 2.5 million days have transpired since this date. Julian dates are widely used as time variables within astronomical software.

The Julian date format is CYYDDD, where: C is the century subtracted from 19, i.e. 1998's century number is 19 = 19 -19 = 0, 2000 = 20 - 19 = 1. YY is the year within the century, DDD is the day in the year, so for example, May 14th 2021 has a Julian date of 121134.

On the Home tab, click the popup window launcher next to Number. In the Category box, click Date, and then click the date format that you want in the Type list. To delete the serial numbers after all of the dates are converted successfully, select the cells that contain them, and then press DELETE.

Say you are given the JDE Julian Date as 113338, use the following steps to acheive the desired result : Take first digit and add 19 to it, multiply the sum by 100. In this case you will get (19+1) * 100 = 2000, where 1 comes from 113338. Take the next two digits and add to the result obtained in previous step.