How To Add Hours/Minutes/Seconds to a Particular Date having 24/May/2013 1730

How To Add Hours/Minutes/Seconds to a Particular Date having 24/May/2013 1730

select to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') "Current Date",
       to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') + 1 / 24 "Adding Hours",
       to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') + 55 / 1440  "Adding Minutes",
       to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') + 1 / 86400  "Adding Seconds"
  from dual;

select to_date('24/May/2013 1730:00','dd/Mon/yyyy hh24mi:ss') from dual


 select   to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') +45 / 1440 from dual

  select to_char(to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi'),
                'dd/Mon/yyyy hh24mi') "Current Date",
        to_char(to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') + 1 / 24,
                'dd/Mon/yyyy hh24mi') "Adding Hours",
        to_char(to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') +
                55 / 1440,
                'dd/Mon/yyyy hh24mi') "Adding Minutes",
        to_char(to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') +
                1 / 86400,
                'dd/Mon/yyyy hh24mi') "Adding Seconds"
   from dual;

select to_char(to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi'),
               'dd/Mon/yyyy hh24mi') "Actual Date",
       to_char(to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') + 3 / 24,
               'dd/Mon/yyyy hh24mi') "Adding 3 Hours",
       to_char(to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') +
               55 / 1440,
               'dd/Mon/yyyy hh24mi') "Adding 55 Minutes",
       to_char(to_date('24/May/2013 1730', 'dd/Mon/yyyy hh24mi') +
               10 / 86400,
               'dd/Mon/yyyy hh24mi') "Adding 10 Seconds"
  from dual;