How To Enter Date and Time values in SQL Server Transact-SQL?

Transact-SQL does not support date and time literals. If you want to enter date and time values, you have to use character string literals and rely implicit casting rules to convert them into date and time values.

When casting character string literals into DATETIME values, you can use one of these recognizable data and time formats shown below:

-- Default format for query output
DECLARE @x DATETIME;
SET @x = '2017-05-19 22:55:07.233';
SELECT @x;
----------------------------
2017-05-19 22:55:07.233

-- Default for string print output 
DECLARE @x DATETIME;
SET @x = 'May 19 2017 10:55PM';
SELECT @x;
----------------------------
2017-05-19 22:55:00.000

-- Europe default format
DECLARE @x DATETIME;
SET @x = '19-May-2017 22:55:07.233';
SELECT @x;
----------------------------
2017-05-19 22:55:07.233

-- ISO8601 standard format
DECLARE @x DATETIME;
SET @x = '2017-05-19T22:55:07.233';
SELECT @x;
----------------------------
2017-05-19 22:55:07.233

⇒Variables and Data Types in SQL Server Transact-SQL

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