Your periodic reminder that we are closer to the Y2038 bug than the Y2K bug:

SELECT UNIX_TIMESTAMP("2038-01-18 19:14:07") → 2147483647;
SELECT UNIX_TIMESTAMP("2038-01-18 19:14:08") → NULL;
SELECT VERSION() → 10.4.22-MariaDB-log

Previously, previously, previously, previously, previously.