MySQL DAYNAME() Function

In MySQL, the DAYNAME() function returns the weekday name for a given date.

DAYNAME() Syntax

Here is the syntax of MySQL DAYNAME() function:

DAYNAME(expr)

Parameters

expr

Required. A date or datetime expression.

Return value

The MySQL DAYNAME() function returns the weekday name for a given date, and the return value will be one of the following values: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.

• If the specified expression is not a valid date or datetime, the function will return NULL.
• If the argument is NULL, the function will return NULL .

DAYNAME() Examples

Here are some examples of the DAYNAME() function.

SELECT
    DAYNAME('2022-02-21'),
    DAYNAME('2022-02-22'),
    DAYNAME('2022-02-23'),
    DAYNAME('2022-02-24'),
    DAYNAME('2022-02-25'),
    DAYNAME('2022-02-26'),
    DAYNAME('2022-02-27'),
    DAYNAME(NOW()),
    DAYNAME('2022-02-00'),
    DAYNAME('2022-02-30'),
    DAYNAME('Not A DATE'),
    DAYNAME(NULL)\G

DAYNAME('2022-02-21'): Monday
DAYNAME('2022-02-22'): Tuesday
DAYNAME('2022-02-23'): Wednesday
DAYNAME('2022-02-24'): Thursday
DAYNAME('2022-02-25'): Friday
DAYNAME('2022-02-26'): Saturday
DAYNAME('2022-02-27'): Sunday
       DAYNAME(NOW()): Wednesday
DAYNAME('2022-02-00'): NULL
DAYNAME('2022-02-30'): NULL
DAYNAME('Not A DATE'): NULL
        DAYNAME(NULL): NULL

To return today’s weekday name, you can use NOW(), CURDATE(), CURRENT_DATE(), or SYSDATE(). for example:

SELECT
    DAYNAME(NOW()),
    DAYNAME(CURDATE()),
    DAYNAME(CURRENT_DATE()),
    DAYNAME(SYSDATE())\G

         DAYNAME(NOW()): Wednesday
     DAYNAME(CURDATE()): Wednesday
DAYNAME(CURRENT_DATE()): Wednesday
     DAYNAME(SYSDATE()): Wednesday

Note that your results may be different.