NLS_DATE_LANGUAGE

Property	Description
Parameter type	String
Syntax	`NLS_DATE_LANGUAGE =` `language`
Default value	Derived from `NLS_LANGUAGE`
Modifiable	`ALTER SESSION`
Range of values	Any valid `NLS_LANGUAGE` value

NLS_DATE_LANGUAGE specifies the language to use for the spelling of day and month names and date abbreviations (a.m., p.m., AD, BC) returned by the TO_DATE and TO_CHAR functions.

Note:

The value of this initialization parameter NLS_DATE_LANGUAGE is used to initialize the session value of this parameter, which is the actual value referenced by the SQL query processing. This initial value is overridden by a client-side value if the client uses the Oracle JDBC driver or if the client is OCI-based and the NLS_LANG client setting (environment variable) is defined. The initialization parameter value is, therefore, usually ignored.