Question: I am using Zotero as a plugin in Firefox on a Ubuntu12.4 machine.

Since last week, the BibTex format for export seems to have disappeared from the options in the preferences. I have absolutely no idea why and I don't really care why. I simply want to get it back since it worked before.
So I am looking for explanation on how to reinstall this option and eventually on where to get the format.
I tried to desactivate and reactivate the zotero plug-in but it did not work.

Thanks for any help

Answer: 
I did't test so i'm not 100% sure.
Can you change your column to be datetime2(7) on database? and then send the datetime in following format YYYY-MM-DD hh:mm:ss.
I suggest that because the datetime2 as a Default string literal in above format while the datetime don't has it so it's based on the system culture.
 I suggest that because the Datetime2 has the default literal string while the DateTime don't have it you can Click [MSDN web site](https://msdn.microsoft.com/en-us/library/bb677335.aspx) to find out more about it.
Excel stores internally the datetime as a number. So you will probably have to read it as number as well and convert it "manually" before storing it in SQL