OPTION 1)

Assuming that you source date that is in the number format dd.mm.yyyy stored as an excel date serial and only formatted to display as dd.mm.yyyy then the best fix is to select the cells you want to modify. Go to your home tab, and select the number format and change it to General. See Green circles in image below. IF the format is already set to general, or when you switch it to general your numbers do not change, then it is most likely that your date in dd.mm.yyyy format is actually text. and will needed to be converted as per OPTION 2 below. However, if the number does change when you set it to general, select the arrow in the bottom right corner of the number area (see red circle).

After clicking the arrow in the red circle you should see a screen similar to the one below:

Select Custom from the category list on the left, and then in the Type bar enter the format you want which is yyyy/mm/dd.

OPTION 2

=date(Right(A1,4),mid(A1,4,2),left(A1,2))

This assumes your original date is a string stored in A1, and converts the string to a date serial in the form excel stores dates in.1 You can copy this formula down beside you dates. You can then apply cell formatting for the date as described above, or use the build short or long date if that style matches your needs.

1Excel counts the number of days since January 0 1900 for the windows version of excel. I believe mac is 1904 or 1905.

Answer from Forward Ed on Stack Overflow
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Microsoft Support
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Format a date the way you want in Excel - Microsoft Support
To enter a date that will update to the current date each time you reopen a worksheet or recalculate a formula, type =TODAY() in an empty cell, and then press ENTER. When you enter some text into a cell such as "2/2", Excel assumes that this is a date and formats it according to the default ...
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Microsoft Support
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DATE function - Microsoft Support
Note: Excel stores dates as sequential serial numbers so that they can be used in calculations. January 1, 1900 is serial number 1, and January 1, 2008 is serial number 39448 because it is 39,447 days after January 1, 1900. You will need to change the number format (Format Cells) in order to ...
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How do I format dates to show MM/DD/YYYY?
Go to custom and type in MM/DD/YYYY and it'll work for you More on reddit.com
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java dateformat - Change date format of cell in excel from dd.mm.yyyy to yyy/mm/dd ( excel version 2013 ) - Stack Overflow
Select Custom from the category list on the left, and then in the Type bar enter the format you want which is yyyy/mm/dd. ... This assumes your original date is a string stored in A1, and converts the string to a date serial in the form excel stores dates in.1 You can copy this formula down beside ... More on stackoverflow.com
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How can I write a formula to change a date format of 20230214 to 02/14/2023
I have weekly reports that produce dates as yyyymmdd. I then need to convert thousands of cell entries to mm/dd/yyyy format which takes hours. There's got to be an easier way. Thank you. Microsoft 365 and Office | Excel | For business | Windows More on learn.microsoft.com
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Keeping a Date Format in a Formula
Hello all, I have several columns of data. In one of the columns is a date. In the last column, I am using a formula to aggregate all of the columns into one cell (=B6&"; "&C6&"; "&D6&"; "&F6&"... More on mrexcel.com
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MrExcel
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Returning a date format in a formula as date format (currently showing as text) | MrExcel Message Board
February 20, 2021 - I have a simple formula that looks ... Release date = 12/03/2021 - Black Crowes - Southern Harmony my formula looks like this ="RELEASE DATE = "&M60 &" - "&B60&" - "&C60 Excel is returning the date in text format so it comes out like this: Release date = 44267 - Black Crowes - ...
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Microsoft Support
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TEXT function - Microsoft Support
Now, all you need to do is press Ctrl+V to paste the format code into your TEXT formula, like: =TEXT(B2,"mm/dd/yy"). Make sure that you paste the format code within quotes ("format code"), otherwise Excel will give you an error message.
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Alteryx
alteryx.com โ€บ home โ€บ how to change date format in excel
How to Change Date Format in Excel | Alteryx
August 12, 2025 - Sometimes Excel will format any negative numbers as a date because of the hyphens. To fix this, select the cells, open the options menu, and select โ€œAdvanced.โ€ On that menu, select โ€œUse 1904 date system.โ€ ยท Use functions to work with todayโ€™s date. If you want a cell to always display the current date, use the formula =TODAY() and press ENTER.
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Microsoft Support
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Format numbers as dates or times - Microsoft Support
To quickly enter the current date ... will update to the current date each time you reopen a worksheet or recalculate a formula, type =TODAY() in an empty cell, and then press ENTER....
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Ablebits
ablebits.com โ€บ ablebits blog โ€บ excel โ€บ date โ€บ excel date functions - formula examples of date, today, etc.
Excel date functions - formula examples of DATE, TODAY, etc.
March 21, 2023 - To force the spreadsheet to recalculate, and consequently get your NOW formula to update its value, press either Shift+F9 to recalculate only the active worksheet or F9 to recalculate all open workbooks. For more details, please see How to use NOW function in Excel. DATEVALUE(date_text) converts a date in the text format to a serial number that represents a date.
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Ablebits
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How to change Excel date format and create custom formatting
October 10, 2023 - Another possible way to display negative numbers as negative dates in Excel is using the TEXT function. For example, if you are subtracting C1 from B1 and a value in C1 is greater than in B1, you can use the following formula to output the result in the date format:
Top answer
1 of 5
8

OPTION 1)

Assuming that you source date that is in the number format dd.mm.yyyy stored as an excel date serial and only formatted to display as dd.mm.yyyy then the best fix is to select the cells you want to modify. Go to your home tab, and select the number format and change it to General. See Green circles in image below. IF the format is already set to general, or when you switch it to general your numbers do not change, then it is most likely that your date in dd.mm.yyyy format is actually text. and will needed to be converted as per OPTION 2 below. However, if the number does change when you set it to general, select the arrow in the bottom right corner of the number area (see red circle).

After clicking the arrow in the red circle you should see a screen similar to the one below:

Select Custom from the category list on the left, and then in the Type bar enter the format you want which is yyyy/mm/dd.

OPTION 2

=date(Right(A1,4),mid(A1,4,2),left(A1,2))

This assumes your original date is a string stored in A1, and converts the string to a date serial in the form excel stores dates in.1 You can copy this formula down beside you dates. You can then apply cell formatting for the date as described above, or use the build short or long date if that style matches your needs.

1Excel counts the number of days since January 0 1900 for the windows version of excel. I believe mac is 1904 or 1905.

2 of 5
6

The problem is that your date is a text string, so changing the cell number format won't have any effect.

One method of convert the dates in place to "real" dates is to use the Text to Columns wizard.

  • Select your date(s).

  • Select the Text to Columns option on the Data Tools Tab of the Data Ribbon:

  • At Step 1, select "Fixed Width" then "Next"

  • Step 2 is irrelevant

  • At Step 3, for the date column, select DMY as the format. You can also select the "Destination" if you want the results written elsewhere.

  • Then "Finish".

That's it. Your dates will be converted in place

Since your dates are now "real" Excel dates, you can use the Cell โ–บ Number Format dialog to change the format to whatever you want.

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Exceljet
exceljet.net โ€บ convert date to text
Convert date to text - Excel formula | Exceljet
May 14, 2024 - You can use the TEXT function to convert dates or any numeric value to a fixed text format. You can explore available formats by navigating to Format Cells (Win: Ctrl + 1, Mac: Cmd + 1) and selecting various format categories in the list to the left.
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Microsoft Support
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DATEVALUE function - Microsoft Support
The DATEVALUE function converts ... that Excel recognizes as a date. For example, the formula =DATEVALUE("1/1/2008") returns 39448, the serial number of the date 1/1/2008. Remember, though, that your computer's system date setting may cause the results of a DATEVALUE function to vary from this ...
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MrExcel
mrexcel.com โ€บ forums โ€บ question forums โ€บ excel questions
Keeping a Date Format in a Formula | MrExcel Message Board
July 17, 2020 - For the column with your dates, you need to use the TEXT function in order to set the desired format for your date. Since you did not say, I'll assume Column D contains your dates. With this assumption, you would need to change your formula to this where I show the addition you need to make in red (change the format pattern as needed)...
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TechOnTheNet
techonthenet.com โ€บ excel โ€บ formulas โ€บ format_date.php
MS Excel: How to use the FORMAT Function with Dates (VBA)
The syntax for the FORMAT function in Microsoft Excel is: Format ( expression, [ format, [ firstdayofweek, [firstweekofyear] ] ] ) ... The date value to format.
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Wall Street Mojo
wallstreetmojo.com โ€บ home โ€บ all blogs โ€บ excel resources โ€บ date format in excel
Date Format in Excel - How to Change & Custom Format?
March 11, 2013 - The steps to convert text values to dates having the given format are listed as follows: Step 1: First, enter the following formula in cell B1. ... Then, press the "Enter" key. Note 1: The VALUE function returns the numeric form of a text string that represents a number. In other words, it converts a number looking like the text into an actual number. Note 2: Instead of the VALUE function, one can also use the DATEVALUE function of Excel...
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Quora
quora.com โ€บ How-do-I-apply-the-date-format-in-Excel
How to apply the date format in Excel - Quora
As noted above, I recommend you first try the solutions below (adding zero and using text to columns) before you use a formula. Both workarounds are faster and require less effort. ... The DATE function creates a valid date using three arguments: year, month, and day: =DATE(year,month,day) In cell C6, we use the LEFT, MID, and RIGHT functions to extract each of these components from a text string... ... To convert a Unix timestamp to Excel's date format, you can use a formula based on the DATE function.
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ExtendOffice
extendoffice.com โ€บ documents โ€บ excel โ€บ how to convert date to yyyy-mm-dd format in excel?
How to convert date to yyyy-mm-dd format in Excel?
November 22, 2024 - I1, and type this formula =TEXT(G1, "yyyy-mm-dd"), and press Enter key, then drag AutoFill handle over the cells needed this formula. Now all dates are converted to texts and shown as yyyy-mm-dd format. How to easily convert between multiple energy units in Excel?
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Microsoft Support
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Convert dates stored as text to dates - Microsoft Support
Then copy the formula, select the cells that contain the text dates, and use Paste Special to apply a date format to them. ... Select a blank cell and verify that its number format is General. ... Select the cell that contains the text-formatted date that you want to convert. ... Press ENTER, and the DATEVALUE function returns the serial number of the date that is represented by the text date. ... Excel stores dates as sequential serial numbers so that they can be used in calculations.
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SimonsezIt
simonsezit.com โ€บ article โ€บ short-date-format-in-excel
Short Date Format in Excel โ€“ 3 Different Methods
May 21, 2025 - As mentioned earlier, Excel stores the date in the dd-mm-yyyy format by default no matter what formatting you choose. ... In the example above, cell A5 displays the date in a long format as Friday, 17 July 1987.