1700 was / was not a leap year

Oracle Linux: 1700 was a leap year
$ cal 2 1700
    February 1700
Su Mo Tu We Th Fr Sa
             1  2  3
 4  5  6  7  8  9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29

Oracle Database: 1700 was not a leap year

SQL*Plus: Release 12.1.0.2.0 Production on Mon Jul 27 02:43:47 2015

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Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Advanced Analytics
and Real Application Testing options

SQL> select to_date('17000301','yyyymmdd') - 1 from dual;

TO_DATE('17000
--------------
17000228 00:00