Ecto / Postgres timestamp before ‘year 0’

I’m currently trying to store dates in Postgresql that are before ISO8601 ‘year 0’ and am running into issues. Postgresql stores dates internally as JD and can correctly insert/remove dates. I’m storing the date generally as NaiveDateTime and it works fine for anything > year 0.

For instance, the following query works fine in SQL.

sql> insert into table1 set t = '1000-01-01BC 00:00:00'; 

However, trying to load this in Ecto doesn’t seem to work as we’re referring to a calendar function that doesn’t have any representation of times before 0.

    (stdlib 3.13) calendar.erl:257: :calendar.last_day_of_the_month/2
    (stdlib 3.13) calendar.erl:133: :calendar.date_to_gregorian_days/3
    (stdlib 3.13) calendar.erl:155: :calendar.datetime_to_gregorian_seconds/1
    (postgrex 0.15.8) lib/postgrex/extensions/timestamp.ex:48: Postgrex.Extensions.Timestamp.encode_elixir/1
    (postgrex 0.15.8) lib/postgrex/type_module.ex:897: Postgrex.DefaultTypes.encode_params/3
    (postgrex 0.15.8) lib/postgrex/query.ex:75: DBConnection.Query.Postgrex.Query.encode/3

-spec datetime_to_gregorian_seconds(DateTime) -> Seconds when
      DateTime :: datetime(),
      Seconds :: non_neg_integer().
datetime_to_gregorian_seconds({Date, Time}) ->
    ?SECONDS_PER_DAY*date_to_gregorian_days(Date) +
        time_to_seconds(Time).

What’s the appropriate way for dealing with this? As far as I know, erlang/elixir doesn’t have any methodology for monkey-patching, the only thing I could think of is to store these dates in an alternative format as a workaround. Any thoughts?