How to load file with time (Date) type into Hive table?

I'm using hive to create and try to load file content into the table. There's a column type "Date" and the date format in the file is dd/mm/yy, for example: 01/12/2013 But when I trie to load the data into table from the file, the column values corresponding to the "Date" is always NULL, as if failed to load the date content. I put the column content into a txt file and upload to the hdfs, so, the column may be: id, name, birthdate and corresponding value are: 1, "Joan", 04/05/1989 But the "04/05/1989" seems can't be read into the table, always null. Please tell me if the format in my txt file is wrong or I need some specific grammar when loading date type data into Hive table. Thanks!