{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/announcement-expiration",
  "title": "announcement-expiration",
  "type": "string",
  "format": "date-time",
  "description": "The time at which the announcement expires. This is a timestamp in [ISO 8601](https://en.wikipedia.org/wiki/ISO_8601) format: `YYYY-MM-DDTHH:MM:SSZ`. To set an announcement that never expires, omit this parameter, set it to `null`, or set it to an empty string.",
  "example": "\"2021-01-01T00:00:00.000-07:00\"",
  "nullable": true
}