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Microsoft® Excel Military Zulu Time UTC
Date Time Conversion

"How to create an Excel function for converting date/time values into military UTC Zulu date-time format

How to use formatting, and a formula, each of which will convert a data and time in Excel into a military data/time format that includes the time zone letter indicating the UTC time zone offset.

Last updated on 2020-05-26 by David Wallis.


The date appearing in an Excel cell as dd/mm/yyyy HH:MM is required in the military format ddHHMMZmmmyyyy. The key to these forms is this:


Consider this input in cell A1 of the spreadsheet (on a PC with its regional options date/time set to dd/mm/yyyy format so that a date of 12 July 2018) is displayed as 12/07/2018 14:15.

Using a custom format of ddhhmm"Z"mmmyyyy will display the date/time as 121415ZJul2018, but I understand that sometimes the format requires that JUL.

I’ve been unable to create a custom format that will capitalise the Jul, so to achieve this I have used this formula in cell B1:


That formula yields the result 121415ZJUL2018 in cell B1.

Note that the formula is one long one with no spaces. So if you are copying it into Excel, make sure that no spaces appear in the formula and that the formula is not split across more than on cell

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Convert 12/07/2018 14:15 into 121415ZJul2018 or 121415ZJUL2018