Convert DDMMYY to MMDDYY in Excel

To convert dates from DD/MM/YYYY to MM/DD/YYYY in Excel, use the formula =IF(B1="","",IF(DAY(B1)>12,DAY(B1)&"/"&MONTH(B1)&"/"&YEAR(B1),VALUE(DATE(YEAR(B1),DAY(B1),MONTH(B1))))). This is effective for large datasets with dates formatted as DD/MM/YYYY needing conversion to MM/DD/YYYY.

Understanding Excel Date Storage

Excel stores dates as sequential numbers known as serial dates, which represent the count of days since January 1, 1900. Times are stored as decimal fractions of a day.

Formatting Dates in Excel

The default date format in Excel is MM/DD/YYYY, which can be influenced by the system's regional settings. Dates formatted as text won't be recognized as dates by Excel functions without conversion.

Converting Date and Time Formats

For cases requiring the truncation of time from a date-time format (DD/MM/YYYY, Hour:Minute) to a pure date format (DD/MM/YYYY), use the DATEVALUE and TEXT functions for conversion and comparison tasks such as XLOOKUP.

Handling Incomplete Dates

Without a specific year in a date, Excel assumes the current year based on the system's date. Excel does not recognize dates before 1900.

Using Excel Functions for Conversion

Apply the DATEVALUE function to convert text to a date, and use LEFT to extract the first 10 characters from a string when separating date from time. To display a date as text, use the TEXT function.

Common Use Cases

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  Converting date formats for a US-based audience or system requirements
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  Standardizing heterogeneous date data from multiple international sources
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  Preparing datasets for software that requires mmddyy date input
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  Facilitating date comparison tasks by aligning date formats
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  Streamlining data import processes into systems that require mmddyy formatting

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