Extract timestamp from uuid

uuid_timestamp.sql

-- Source from: https://stackoverflow.com/questions/24178485/cast-or-extract-timestamp-from-v1-uuid-in-postgresql/61508178
CREATE OR REPLACE FUNCTION uuid_timestamp(uuid UUID) RETURNS TIMESTAMPTZ AS $$
DECLARE
  bytes bytea;
BEGIN
  bytes := uuid_send(uuid);
  RETURN to_timestamp(
             (
                 (
                   (get_byte(bytes, 0)::bigint << 24) |
                   (get_byte(bytes, 1)::bigint << 16) |
                   (get_byte(bytes, 2)::bigint <<  8) |
                   (get_byte(bytes, 3)::bigint <<  0)
                 ) + (
                   ((get_byte(bytes, 4)::bigint << 8 |
                   get_byte(bytes, 5)::bigint)) << 32
                 ) + (
                   (((get_byte(bytes, 6)::bigint & 15) << 8 | get_byte(bytes, 7)::bigint) & 4095) << 48
                 ) - 122192928000000000
             ) / 10000000::double precision
         );
END
$$ LANGUAGE plpgsql
IMMUTABLE PARALLEL SAFE
RETURNS NULL ON NULL INPUT;