postgres format date in select

1select pg_catalog.concat(current_date,' 00:00:00')::timestamp /*Formata hora por exemplo no where*/
2
3and plan_signed_at = TO_CHAR(created_at, 'YYYY-mm-dd')::timestamp /*Formata hora por exemplo no where um é date, o outro datetime*/
4
5select  NOW() - INTERVAL '180' MINUTE /*pega a data e hora com 3 horas menos*/
6
7select to_char(NOW(), 'yyyy/MM/dd HH24:MI:SS') AS date_no_tz, NOW() as date_tz /*data formatada com e sem timezone*/