---
title: "DAY (Transact-SQL) | Microsoft Docs"
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ms.date: "07/30/2017"
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  - "date and time [SQL Server], DAY"
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  - "DAY function [SQL Server]"
  - "dates [SQL Server], days"
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  - "dateparts [SQL Server], day"
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---
# DAY (Transact-SQL)
[!INCLUDE[tsql-appliesto-ss2008-all_md](../../includes/tsql-appliesto-ss2008-all-md.md)]

Returns an integer representing the day (day of the month) of the specified *date*.
  
For an overview of all [!INCLUDE[tsql](../../includes/tsql-md.md)] date and time data types and functions, see [Date and Time Data Types and Functions (Transact-SQL)](../../t-sql/functions/date-and-time-data-types-and-functions-transact-sql.md).
  
![Topic link icon](../../database-engine/configure-windows/media/topic-link.gif "Topic link icon") [Transact-SQL Syntax Conventions](../../t-sql/language-elements/transact-sql-syntax-conventions-transact-sql.md)
  
## Syntax  
  
```sql
-- Syntax for SQL Server, Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse  
  
DAY ( date )  
```  
  
## Arguments  
*date*  
Is an expression that can be resolved to a **time**, **date**, **smalldatetime**, **datetime**, **datetime2**, or **datetimeoffset** value. The *date* argument can be an expression, column expression, user-defined variable or string literal.
  
## Return Type  
**int**
  
## Return Value  
DAY returns the same value as [DATEPART](../../t-sql/functions/datepart-transact-sql.md) (**day**, *date*).
  
If *date* contains only a time part, the return value is 1, the base day.
  
## Examples  
The following statement returns `30`. This is the number of the day.
  
```sql
SELECT DAY('2015-04-30 01:01:01.1234567');  
```  
  
The following statement returns `1900, 1, 1`. The argument for *date* is the number `0`. [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)] interprets `0` as January 1, 1900.
  
```sql
SELECT YEAR(0), MONTH(0), DAY(0);  
```  
  
## Examples: [!INCLUDE[ssSDWfull](../../includes/sssdwfull-md.md)] and [!INCLUDE[ssPDW](../../includes/sspdw-md.md)]  
The following example returns `30`. This is the number of the day.
  
```sql
-- Uses AdventureWorks  
  
SELECT TOP 1 DAY('2010-07-30T01:01:01.1234')   
FROM dbo.DimCustomer;  
```  
  
The following example returns `1900, 1, 1`. The argument for *date* is the number `0`. [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)] interprets `0` as January 1, 1900.
  
```sql
-- Uses AdventureWorks  
  
SELECT TOP 1 YEAR(0), MONTH(0), DAY(0) FROM dbo.DimCustomer;  
```  
  
## See also
[CAST and CONVERT (Transact-SQL)](../../t-sql/functions/cast-and-convert-transact-sql.md)