One would think, but it's inconsistent unfortunately. Most platforms have input and output of ISO 8601 but they are less interoperable than you would expect. PH

One would think, but it's inconsistent unfortunately. Most platforms have input and output of ISO 8601 but they are less interoperable than you would expect. PHP's claimed ISO 8601 parsing is completely inadequate; it consists of a single format string. Postgres's ISO 8601 output is, by their own admission, broken: https://www.postgresql.org/docs/12/datatype-datetime.html#DATATYPE-DATETIME-OUTPUT https://www.postgresql.org/docs/12/datatype-datetime.html#DA...