We usually retrieve table information from ALL_TABLES, but it has no table creation date. This is because table is also an object type, so we should turn to ALL_OBJECTS.
A. Oracle Table Creation Date
Here we use OBJECT_TYPE to limit the object type only to TABLE.
First of all, we format the date time of current session.
SQL> alter session set nls_date_format='YYYY-MM-DD HH24:MI:SS';
Session altered.
Then we perform the query.
SQL> select created from all_objects where object_type = 'TABLE' and owner = 'ERPAPP' and object_name = 'PAYMENT_DAY';
CREATED
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2017-11-03 15:49:39
Further reading: How Big a Table Can be?
B. Oracle Index Creation Date
As for index creation date, it's the same way to check.
SQL> select created from all_objects where object_type = 'INDEX' and owner = 'ERPAPP' and object_name = 'PAYMENT_DAY_IDX';
CREATED
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2017-11-05 09:36:02