Date is 7 bytes length.
Code:
SQL> create table t1 (rdate date);

Table created.

SQL> insert into t1 values (sysdate);

1 row created.

SQL> commit;

Commit complete.

SQL> select dump(rdate) from t1 ;

DUMP(RDATE)
--------------------------------------------------------------------------------
Typ=12 Len=7: 120,106,2,23,15,60,57
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