gitlab-org--gitlab-foss/app/assets/javascripts/sidebar/queries/update_epic_start_date.mutation.graphql

mutation updateEpicStartDate($input: UpdateEpicInput!) {
  issuableSetDate: updateEpic(input: $input) {
    issuable: epic {
      id
      startDateIsFixed
      startDateFixed
      startDateFromMilestones
    }
    errors
  }
}