Oracle 12c Last login time

The last login time for non-SYS users is displayed when you log on. This feature is on by default. The last login time is displayed in local time format. You can use the -nologintime option to disable this security feature. After you login, the last login information is displayed

C:\Users\XXXXX>sqlplus system/XXXX

SQL*Plus: Release 12.1.0.1.0 Production on Tue Mar 4 15:08:08 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Last Successful login time: Mon Mar 03 2014 17:48:00 +05:30

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

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For more details please refer to below oracle site
http://docs.oracle.com/cd/E16655_01/server.121/e18404/ch_three.htm