And here is old thread from Firebird-architect

https://groups.yahoo.com/neo/groups/firebird-architect/conversations/messages/8148

On Thu, Aug 7, 2014 at 5:00 PM, 'Paul Beach' pabeach@...
[Firebird-general] <Firebird-general@yahoogroups.com> wrote:

>> I know I had a link to a post by Jim as to why November 17, 1898 was '0'
>> on the date format. I've fond a post referring to it, but I'd like to
>> complete the notes on some time related stuff I'm work on, so does
>> anybody have the link?
>
>> I think it's November 17, 1858 (not 1898), 0h00, which is the epoch of the Modified Julian Date.
>
> http://h71000.www7.hp.com/wizard/wiz_2315.html
>
>
> Paul Beach
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