Date Function - Search localsearch

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https://support.microsoft.com/en-us/office/date-fu…

DATE function - Microsoft Support

Use Excel's DATE function when you need to take three separate values and combine them to form a date. The DATE function returns the sequential serial number that represents a particular date. Year Required. The value of the year argument can include one to four digits.

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https://support.microsoft.com/en-us/office/date-an…

Date and time functions (reference) - Microsoft Support

Use date and time functions to create formulas that return serial numbers, display a specific date or time, or that calculate the difference between dates or times.

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Choose the right date function - Microsoft Support

Date functions like DateAdd, DatePart, and DateSerial help you calculate and display dates the way you want.

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https://support.microsoft.com/en-us/office/calcula…

Calculate the difference between two dates - Microsoft Support

How to calculate the number of days, months, or years between two dates using the DATEIF function in Excel.

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Add or subtract dates - Microsoft Support

Add or subtract days, months, or years from a date by using a formula or date functions in Excel.

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https://support.microsoft.com/en-us/office/insert-…

Insert the current date and time in a cell - Microsoft Support

In a worksheet, the most common way to return a dynamic date or time in a cell is by using a worksheet function. To insert the current date or time so that it is updatable, use the TODAY and NOW functions, as shown in the following example.

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https://support.microsoft.com/en-us/office/how-to-…

How to correct a #VALUE! error in the DATEVALUE function

So the first thing you will need to check when you encounter the #VALUE! error with a Date function is to verify if your Date and Time settings are supporting the Date format in the date_text argument.

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https://support.microsoft.com/en-us/office/date-fu…

Date Function - Microsoft Support

To set the system date, use the Date statement. If you use the Date function with a Gregorian calendar, the behavior of Date$ is unchanged by the Calendar property setting.

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https://support.microsoft.com/en-us/office/format-…

Format a date the way you want in Excel - Microsoft Support

If you don’t like the default date format, you can pick a different one in Excel, like February 2, 2012 or 2/2/12. You can also create your own custom format in Excel.

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https://support.microsoft.com/en-us/office/dateval…

DATEVALUE function - Microsoft Support

The DATEVALUE function converts a date that is stored as text to a serial number that Excel recognizes as a date. The DATEVALUE function is helpful in cases where a worksheet contains dates in a text format that you want to filter, sort, or format as dates, or use in date calculations.

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https://support.microsoft.com/en-us/office/datepar…

DatePart Function - Microsoft Support

You can use the DatePart function to evaluate a date and return a specific interval of time. For example, you might use DatePart to calculate the day of the week or the current hour.