diff --git a/sql/import.sql b/sql/import.sql
index 136d2c8..a8f3961 100644
--- a/sql/import.sql
+++ b/sql/import.sql
@@ -11,6 +11,13 @@
 ALTER TABLE import.personnes ALTER COLUMN id TYPE INTEGER USING (id::integer);
 ALTER TABLE import.periodes ALTER COLUMN id TYPE INTEGER USING (id::integer);
 
+-- 2. Copy date columns with right date type
+ALTER TABLE import.personnes ADD column birthdate1 DATE; UPDATE import.personnes SET birthdate1 = to_date(birthdate,'DD/MM/YYYY') WHERE birthdate != '';
+ALTER TABLE import.personnes ADD column deathdate1 DATE; UPDATE import.personnes SET deathdate1 = to_date(deathdate,'DD/MM/YYYY') WHERE deathdate != '';
+ALTER TABLE import.personnes ADD column validfrom1 DATE; UPDATE import.personnes SET validfrom1 = to_date(validfrom,'DD/MM/YYYY') WHERE validfrom != '';
+ALTER TABLE import.personnes ADD column household_startdate1 DATE; UPDATE import.personnes SET household_startdate1 = to_date(household_startdate,'DD/MM/YYYY') WHERE household_startdate != '';
+ALTER TABLE import.periodes ADD column openingdate1 DATE; UPDATE import.periodes SET openingdate1 = to_date(openingdate::text,'DD/MM/YYYY') WHERE openingdate != '';
+ALTER TABLE import.periodes ADD column closingdate1 DATE; UPDATE import.periodes SET closingdate1 = to_date(closingdate,'DD/MM/YYYY') WHERE closingdate != '';
 --
 -- UP
 --
@@ -20,6 +27,14 @@ ALTER TABLE import.periodes ALTER COLUMN id TYPE INTEGER USING (id::integer);
 -- DOWN
 --
 
+-- Undo 2.
+ALTER TABLE import.personnes DROP column birthdate1;
+ALTER TABLE import.personnes DROP column deathdate1;
+ALTER TABLE import.personnes DROP column validfrom1;
+ALTER TABLE import.personnes DROP column household_startdate1;
+ALTER TABLE import.periodes DROP column openingdate1;
+ALTER TABLE import.periodes DROP column closingdate1;
+
 
 --
 -- SELECT