I have this question since the dawn of my programming career. Is there really a culture neutral format for datetime in sql server so that when ever I'm sending query string from a client side to the database server running sql server 2008 side having different system datetime format, and if the query contains a date converted to a string, what format would not give me an error.
I recommend reading Tibor Karaszi's The ultimate guide to the datetime datatypes.
If you input your date/time in unseparated or ISO 8601 format, then you should be fine with any configuration.
Unseparated = 'yyyymmdd hh:mm:ss'
ISO 8601 = 'yyyy-mm-ddThh:mm:ss'
Update (from comments):
If you need to enter a date only (without the time part), then you have to use the 'YYYYMMDD' format, as 'YYYY-MM-DD' will not work. See the linked article for an example.
You could consider storing your date/times in UNIX time format.
来源：https://stackoverflow.com/questions/8816712/what-is-the-culture-neutral-dateformat-for-sql-server