I presently access a series of views and materialized views. The materialized are maintained by a third party who offers little information regarding the frequency and success
Unfortunately oracles default date format is YYYY-MM-DD. If you need the time just use something like this:
SELECT owner, mview_name, to_char(LAST_REFRESH_DATE, 'yyyy-mm-dd hh24:mi:ss') last_refresh_date FROM all_mviews WHERE owner = 'FOO' AND mview_name = 'MV_BAR';