bad dates, PostgreSQL

Language: Layout:

create table dates (proper_date date, year int, month int, day int);

INSERT INTO dates (proper_date,year,month,day) 
VALUES
  (DATE '2017-10-01',2017,10,1),
  (DATE '2017-11-01',2017,11,1),
  (DATE '2017-12-01',2017,12,1),
  (DATE '2018-01-01',2018,1,1),
  (DATE '2018-02-01',2018,2,1),
  (DATE '2018-03-01',2018,3,1),
  (DATE '2018-04-01',2018,4,1),
  (DATE '2018-05-01',2018,5,1),
  (DATE '2018-06-01',2018,6,1),
  (DATE '2018-07-01',2018,7,1),
  (DATE '2018-08-01',2018,8,1),
  (DATE '2018-09-01',2018,9,1),
  (DATE '2018-10-01',2018,10,1),
  (DATE '2018-11-01',2018,11,1),
  (DATE '2018-12-01',2018,12,1),
  (DATE '2019-01-01',2019,1,1),
  (DATE '2019-02-01',2019,2,1),
  (DATE '2019-03-01',2019,3,1),
  (DATE '2019-04-01',2019,4,1),
  (DATE '2019-05-01',2019,5,1),
  (DATE '2019-06-01',2019,6,1),
  (DATE '2019-07-01',2019,7,1),
  (DATE '2019-08-01',2019,8,1),
  (DATE '2019-09-01',2019,9,1),
  (DATE '2019-10-01',2019,10,1),
  (DATE '2019-11-01',2019,11,1),
  (DATE '2019-12-01',2019,12,1),
  (DATE '2020-01-01',2020,1,1),
  (DATE '2020-02-01',2020,2,1),
  (DATE '2020-03-01',2020,3,1),
  (DATE '2020-04-01',2020,4,1),
  (DATE '2020-05-01',2020,5,1),
  (DATE '2020-06-01',2020,6,1),
  (DATE '2020-07-01',2020,7,1),
  (DATE '2020-08-01',2020,8,1),
  (DATE '2020-09-01',2020,9,1),
  (DATE '2020-10-01',2020,10,1),
  (DATE '2020-11-01',2020,11,1),
  (DATE '2020-12-01',2020,12,1);

select *
from dates
where (year, month, day) >= (2018,2,3) and (year, month, day) <= (2020, 1, 3);


absolute service time: 0,5 sec