For keyword 'format' SHOULD offer an option to disable validation

[infisamk]

By specification https://json-schema.org/draft-04/draft-fge-json-schema-validation-00#rfc.section.7.2 for keyword format:

7.2. Implementation requirements
Implementations MAY support the "format" keyword. Should they choose to do so:

they SHOULD implement validation for attributes defined below;
they SHOULD offer an option to disable validation for this keyword.

Implementations MAY add custom format attributes. Save for agreement between parties, schema authors SHALL NOT expect a peer implementation to support this keyword and/or custom format attributes.

I need disable validation for format, becouse date-time in my app use custom format (without T between date and time).

[DannyvdSluijs]

By specification https://json-schema.org/draft-04/draft-fge-json-schema-validation-00#rfc.section.7.2 for keyword format:

You are right the spec mentions the option to disable and we currently don't have any.

I need disable validation for format, becouse date-time in my app use custom format (without T between date and time).

Json-Schema is run by volunteers and contributions from many. Feel free to open a PR to address this issue. I can provide feedback and point you in the right direction if needed.

[infisamk]

I found exists option - Constraint::CHECK_MODE_DISABLE_FORMAT.