Date
A date, or a date and time they choose: an arrival time, a preferred day. This is the right type when YOU are asking them when; `scheduling` is for booking against a calendar you own.
dateA date, or a date and time they choose: an arrival time, a preferred day. This is the right type when YOU are asking them when; scheduling is for booking against a calendar you own.
How it gets answered — extracted from free text by the agent, then re-validated.
Configuration
Fields specific to date. The fields every block has — id, ref, title, required, visibility, media, agentHints, prefillParam, identityField — are documented once.
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"buttonLabel": {
"type": "string",
"maxLength": 60
},
"type": {
"type": "string",
"const": "date"
},
"min": {
"type": "string"
},
"max": {
"type": "string"
},
"disablePast": {
"default": false,
"type": "boolean"
},
"dateFormat": {
"default": "YYYY-MM-DD",
"type": "string",
"enum": [
"YYYY-MM-DD",
"DD/MM/YYYY",
"MM/DD/YYYY"
]
},
"includeTime": {
"default": false,
"type": "boolean"
},
"timeStepMinutes": {
"default": 30,
"type": "integer",
"minimum": 5,
"maximum": 120
},
"timeMin": {
"default": "09:00",
"type": "string",
"pattern": "^\\d{2}:\\d{2}$"
},
"timeMax": {
"default": "18:00",
"type": "string",
"pattern": "^\\d{2}:\\d{2}$"
},
"timeZone": {
"type": "string",
"maxLength": 64
}
},
"required": [
"id",
"ref",
"title",
"type"
],
"$defs": {
"__schema0": {
"type": "object",
"properties": {
"op": {
"type": "string",
"enum": [
"and",
"or"
]
},
"conditions": {
"default": [],
"type": "array",
"items": {
"type": "object",
"properties": {
"left": {
"oneOf": [
{
"type": "object",
"properties": {
"kind": {
"type": "string",
"const": "ref"
},
"ref": {
"type": "string",
"pattern": "^[a-z][a-z0-9_]{1,40}$"
}
},
"required": [
"kind",
"ref"
]
},
{
"type": "object",
"properties": {
"kind": {
"type": "string",
"const": "variable"
},
"name": {
"type": "string",
"pattern": "^[a-z][a-z0-9_]{0,40}$"
}
},
"required": [
"kind",
"name"
]
},
{
"type": "object",
"properties": {
"kind": {
"type": "string",
"const": "hidden"
},
"name": {
"type": "string",
"pattern": "^[a-zA-Z_][a-zA-Z0-9_.-]{0,60}$"
}
},
"required": [
"kind",
"name"
]
},
{
"type": "object",
"properties": {
"kind": {
"type": "string",
"const": "literal"
}
},
"required": [
"kind"
]
}
]
},
"op": {
"type": "string",
"enum": [
"eq",
"neq",
"gt",
"gte",
"lt",
"lte",
"contains",
"not_contains",
"starts_with",
"ends_with",
"matches_regex",
"is_empty",
"is_not_empty",
"is_checked",
"is_not_checked",
"includes",
"not_includes",
"ranked_above",
"ranked_below"
]
},
"value": {
"anyOf": [
{
"type": "string"
},
{
"type": "number"
},
{
"type": "boolean"
},
{
"type": "array",
"items": {
"type": "string"
}
}
]
}
},
"required": [
"left",
"op"
]
}
},
"groups": {
"default": [],
"type": "array",
"items": {
"$ref": "#/$defs/__schema0"
}
}
},
"required": [
"op"
]
}
}
}In a generated draft these arrive as config pairs: disablePast=true to refuse dates already gone.
What you receive
GET /v1/forms/{id} and every "next question" projects blocks through toPublicBlock. For the example above:
{
"id": "blk_date0001",
"ref": "q_start",
"type": "date",
"title": "Start date?",
"required": true,
"imageKey": null,
"media": null,
"minDate": "2026-01-01",
"maxDate": "2026-12-31",
"disablePast": false,
"dateFormat": "YYYY-MM-DD",
"includeTime": false,
"timeStepMinutes": 30,
"timeMin": "09:00",
"timeMax": "18:00"
}What you send
A date as YYYY-MM-DD. When the block includes a time, one moment in UTC, YYYY-MM-DDTHH:mm:ss.sssZ; send it with a Z or an offset (2026-06-01T17:00+05:30), since a bare YYYY-MM-DDTHH:mm is read as UTC.
type Answer = string;curl -X POST https://api.chatform.in/v1/responses/{RESPONSE_ID}/answers \
-H "x-api-key: $CHATFORM_SECRET_KEY" \
-H "content-type: application/json" \
-d '{"ref": "q_start", "value": "2026-06-01"}'What gets stored
The value is normalised before it is saved, so what you read back is not always what you sent.
| You send | Stored | |
|---|---|---|
"2026-06-01" | "2026-06-01" |
Errors
| Code | When | Message |
|---|---|---|
required | an empty answer on a required block | This question needs an answer. |
type | 20260601 | Please provide a date. |
invalid_date | "01/06/2026" — always ISO on the wire, whatever the display format | Please provide a date in YYYY-MM-DD format. |
invalid_time | — | |
time_out_of_range | — | |
past_date | — | |
too_early | "2025-12-31" | Date must be on or after 2026-01-01. |
too_late | "2027-01-01" | Date must be on or before 2026-12-31. |