diff --git a/sqlglot/dialects/oracle.py b/sqlglot/dialects/oracle.py
index b491504746..2ea5cdbecd 100644
--- a/sqlglot/dialects/oracle.py
+++ b/sqlglot/dialects/oracle.py
@@ -37,6 +37,7 @@ class Oracle(Dialect):
         "HH12": "%I",  # alias for HH
         "HH24": "%H",  # Hour of day (0-23)
         "IW": "%V",  # Calendar week of year (1-52 or 1-53), as defined by the ISO 8601 standard
+        "IYYY": "%G",  # 4-digit year of the ISO 8601 week-numbering calendar
         "MI": "%M",  # Minute (0-59)
         "MM": "%m",  # Month (01-12; January = 01)
         "MON": "%b",  # Abbreviated name of month
diff --git a/tests/dialects/test_oracle.py b/tests/dialects/test_oracle.py
index 465d389a1e..6e7d55a7eb 100644
--- a/tests/dialects/test_oracle.py
+++ b/tests/dialects/test_oracle.py
@@ -516,6 +516,18 @@ def test_oracle(self):
                 "postgres": "CAST('2022-01-01' AS DATE)",
             },
         )
+        self.validate_all(
+            "SELECT TO_CHAR(x, 'IYYY-IW')",
+            read={
+                "duckdb": "SELECT STRFTIME(x, '%G-%V')",
+            },
+        )
+        self.validate_all(
+            "SELECT TO_CHAR(CAST(x AS DATE), 'IYYY-IW')",
+            read={
+                "bigquery": "SELECT FORMAT_DATE('%G-%V', x)",
+            },
+        )
 
         self.validate_all(
             "x::binary_double",