Subtracting interval from dates gives the wrong output.

[Alexnortung]

Describe the bug

Subtracting dates with intervals seems to give the wrong output. for example, subtracting one year from 2022-01-01 returns 2021-01-06. But in postgres it produces the expected 2021-01-01.

To Reproduce

SELECT '2022-01-01'::date - interval '1 year';
SELECT '2022-01-01'::date - interval '1 month';

pg-mem version

Used playground