diff --git a/tools/scripts/update_registration_encounter_datetimes,sql b/tools/scripts/update_registration_encounter_datetimes,sql
new file mode 100644
index 000000000..146fb9dc3
--- /dev/null
+++ b/tools/scripts/update_registration_encounter_datetimes,sql
@@ -0,0 +1,47 @@
+select encounter_type_id into @registrationEncId from encounter_type et where uuid = '873f968a-73a8-4f9c-ac78-9f4778b751b6';
+select encounter_type_id into @drugDocEncId from encounter_type et where uuid = '0b242b71-5b60-11eb-8f5a-0242ac110002';
+select encounter_type_id into @commentEncId from encounter_type et where uuid = 'c30d6e06-0f00-460a-8f81-3c39a1853b56';
+
+drop temporary table if exists temp_registration_encounters ;
+create temporary table temp_registration_encounters
+(encounter_id int(11),
+patient_id int(11),
+min_encounter_datetime datetime
+);
+
+
+-- load encounters into temp table that need to be updated
+insert into temp_registration_encounters (encounter_id, patient_id)
+select encounter_id, patient_id   
+from encounter e 
+where e.encounter_type = @registrationEncId
+and e.voided = 0
+and EXISTS 
+	(select 1 from encounter e2
+	where e2.voided = 0
+	and e2.patient_id = e.patient_id 
+	and e2.encounter_type not in (@drugDocEncId, @commentEncId)
+	and date(e2.encounter_datetime) < date(e.encounter_datetime) )
+;
+
+-- update min encounter_datetime on temp table   
+update temp_registration_encounters t 
+set t.min_encounter_datetime = (select min(encounter_datetime) from encounter e where e.patient_id = t.patient_id )
+;
+
+-- update encounter table
+update encounter e
+inner join temp_registration_encounters t on e.encounter_id = t.encounter_id
+set e.encounter_datetime = t.min_encounter_datetime,
+	e.date_changed = now(),
+	e.changed_by  = 1 -- Super User person ID
+;
+
+-- update obs table
+update obs o
+inner join temp_registration_encounters t on o.encounter_id = t.encounter_id
+set o.obs_datetime = t.min_encounter_datetime
+;
+ 
+drop temporary table if exists temp_registration_encounters ;
+