handle early dates (< 100AD) - #425

Cool, I'll keep this as a reference. Definitely gonna need some tests to merge this. Do you have a code snippet of producing a BC date in postgres?

Apparently:

"Valid input for the time stamp types consists of a concatenation of a date and a time, followed by an optional time zone, followed by an optional AD or BC. (Alternatively, AD/BC can appear before the time zone, but this is not the preferred ordering.) "

I've been using things like

//43 BC
insert into tablename (timestamp_column) values ('0043-03-08 14:32:00 BC')
//62 AD
insert into tablename (timestamp_column) values ('0062-03-08 14:32:00')

I'm not in front of a computer with postgres at the moment, but will update it when I do (if I'm wrong).

I've never taken the time to figure out how to add commits to someone elses pull request, so instead I created a local branch, added some failing tests, then applied your pull request as a patch that branch. The tests passed! So, I just opened a pull request with these changes right here:

#432