SQL Server DATENAME() Function

In SQL Server, the DATENAME() function returns a string that represents the specified datepart of a given date.


DATENAME(datepart, date)


datepart: The specific part of the specified date for which the DATENAME() function will return a string, e.g. day, month, year, hours, seconds, etc. The following table lists all valid datepart values:

datepart datepart abbreviation
year y, yy, yyyy
quarter qq, q
month mm, m
dayofyear dy
day dd, d
week wk, ww
hour hh
minute mi, n
second ss, s
millisecond ms
microsecond mcs
nanosecond ns
TZoffset tz

date: A date or character expression that can resolve to one of the following data types: date, datetime, datetime2, time, smalldatetime, or datetimeoffset.

A date can also be a string expression, a user-defined variable, or a table column.

Return Value

Returns the datepart of the given date as nvarchar.

If the date is smalldatetime and datepart is seconds, then DATENAME() returns 00.

If the date is a variable or a table column, and its data type does not include the specified datepart, then DATENAME() function returns an error 9810

Note: DATENAME() can be used in the following clauses of an SQL query: SELECT, WHERE, GROUP BY, HAVING, and ORDER BY.

Get Month Name

In the followin example, month part of current date is returned.


In the following example, different dateparts of a given date string are returned

SELECT DATENAME(mm, '04/20/2021 9:45:52.564722') AS Month
,DATENAME(d, '04/20/2021 9:45:52.564722') AS Day
,DATENAME(yy, '04/20/2021 9:45:52.564722') AS Year
,DATENAME(hh, '04/20/2021 9:45:52.564722') AS Hour
,DATENAME(minute, '04/20/2021 9:45:52.564722') AS Minute
,DATENAME(s, '04/20/2021 9:45:52.564722') AS Second
,DATENAME(ms, '04/20/2021 9:45:52.564722') AS MilliSecond
,DATENAME(mcs, '04/20/2021 9:45:52.564722') AS MicroSecond
,DATENAME(q, '04/20/2021 9:45:52.564722') AS Quarter
,DATENAME(dayofyear, '04/20/2021 9:45:52.564722') AS DayOfYear
,DATENAME(wk, '04/20/2021 9:45:52.564722') AS Week

Use DATENAME() with Columns

The following uses the DATENAME() function with the DateTime type column of a table that returns a year as a string.

Example: DATENAME() with Column
SELECT EmployeeId, DATENAME(yy, HireDate) AS HireYear FROM Employee
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