导出的csv文件包含mm：ss.0格式的日期，我想要日期格式

I am having a strange problem. I am using UI grid in my UI of table view. When I do export to csv file, data in one of the date column shows value as 00:00:00. When I change the data format in excel sheet manually, I can see my date correctly in the column. To better explain, let me give an example of the problem: In UI grid , date column shows the value: 2014:01:01, but when I do export to csv, then csv file shows date: 00:00:00. I am having a strange problem. I am using UI gr