The following query will list all the statistics in the current database, and the date they were lasted updated.
SELECT object_name(object_id) as tablename,
name AS index_name,
STATS_DATE(object_id, stats_id) AS statistics_update_date
FROM sys.stats
WHERE object_id > 1000
ORDER BY object_name(object_id), STATS_DATE(object_id, stats_id);