ruby on rails - ActiveRecord insert return PG::DatetimeFieldOverflow error -

i searched on , find answer error issue little different. have error:

pg::datetimefieldoverflow: error:  date/time field value out of range: "24/05/2016 17:00" hint:  perhaps need different "datestyle" setting. 

if @ logs

    pry(#<webexsync::sync>)> attributes     => {:webex_external_id=>1025, :user_id=>2565, :lesson_times=>[2016-05-24 17:00:00 +0200], :status=>"invited"}  pry(#<webexsync::sync>)> userwebex.create! attributes   user load (1.4ms)  select  "users".* "users" "users"."id" = $1 limit 1  [["id", 2565]]   webex load (0.6ms)  select  "webexes".* "webexes" "webexes"."external_id" = $1  order "webexes"."start_date" desc limit 1  [["external_id", 1025]]   userwebex exists (0.5ms)  select  1 one "user_webexes" ("user_webexes"."user_id" = 2565 , "user_webexes"."webex_external_id" = 1025) limit 1   sql (2.3ms)  insert "user_webexes" ("webex_external_id", "user_id", "lesson_times", "status") values ($1, $2, $3, $4) returning "id"  [["webex_external_id", 1025], ["user_id", 2565], ["lesson_times", "{24/05/2016 17:00}"], ["status", "invited"]] pg::datetimefieldoverflow: error:  date/time field value out of range: "24/05/2016 17:00" hint:  perhaps need different "datestyle" setting. : insert "user_webexes" ("webex_external_id", "user_id", "lesson_times", "status") values ($1, $2, $3, $4) returning "id" activerecord::statementinvalid: pg::datetimefieldoverflow: error:  date/time field value out of range: "24/05/2016 17:00" hint:  perhaps need different "datestyle" setting. 

i cannot figure why object params ok, , date in format [2016-05-24 17:00:00 +0200], while saving activerecord change format in ["lesson_times", "{24/05/2016 17:00}"]

lesson_times array

as error says: hint: perhaps need different "datestyle" setting. , , it's quite true.

here's how can set different datestyle in pg.

set datestyle = "iso, dmy";