I was told to find out the last time an update stats was done on an object.
I used this query to show me StatisticsUpdateDate which is the last date/time updatestats was run on the object
--UpdateStats last update
SELECT
OBJECT_NAME(object_id) AS [ObjectName],
[name] AS [StatisticName],
STATS_DATE([object_id],
[stats_id]) AS [StatisticUpdateDate]
FROM
sys.stats;
Hope this helps.