Can LC_TIME affect timestamp input?

Is it possible for LC_TIME locale to affect the format with which
timestamps are input?

I have DB2 CSV dumps with timestamps like '2003-10-21-22.59.44.000000'
that I want to load into Postgres with \copy.  I would like to eliminate
the sed scripts that convert the timestamps in order to speed up the load.
(I know I could stage it through a temp table and use to_timestamp()
but that requires a temp table for each real table, which is not viable
w.r.t. our project goals).

I created a special locale with the DB2 timestamp format defined and did

        set lc_time='en_DB.UTF-8';

It didn't affect anything, in or out with Postgres.  I know the locale
works because date(1) displays the DB2 format correctly.

Postgres version:       9.2.2 (Built from source)
OS:                     Centos 6.3

Paul Jones