CURRENT_TIMEZONE_ID (Transact-SQL)
Applies to: 
SQL Server 2022 (16.x)
Azure SQL Database
Azure SQL Managed Instance
This function returns the ID of the time zone observed by a server or an instance. For Azure SQL Managed Instance, return value is based on the time zone of the instance itself assigned during instance creation, not the time zone of the underlying operating system.
Note
For SQL Database time zone is always set to UTC and CURRENT_TIMEZONE_ID returns the id of the UTC time zone.
Syntax
CURRENT_TIMEZONE_ID ( )
Arguments
This function takes no arguments.
Return Type
varchar
Remarks
CURRENT_TIMEZONE_ID is a non-deterministic function. Views and expressions that reference this column cannot be indexed.
Example
The value returned will reflect the actual time zone and language settings of the server or the instance.
SELECT CURRENT_TIMEZONE_ID();
/* Returned:
W. Europe Standard Time
*/