curl --request PUT \
  --url https://api-{region}.sesametime.com/schedule/v1/holiday-calendar/{holidayCalendarId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data @- <<EOF
{
  "name": "Zona Valencia",
  "daysOff": [
    {
      "name": "New Year's Day",
      "date": "2021-01-01"
    }
  ]
}
EOF

{
  "data": {
    "id": "37acce51-a7e3-498d-b235-5ae8f8682078",
    "name": "Zona Valencia",
    "companyId": "37acce51-a7e3-498d-b235-5ae8f8682078",
    "dayOff": [
      {
        "id": "15547588-2e7e-4ac2-8f8a-3dce978065ba",
        "name": "New Year's Day",
        "date": "2021-01-01"
      }
    ],
    "typeId": "37acce51-a7e3-498d-b235-5ae8f8682078",
    "default": false
  },
  "meta": {
    "currentPage": 1,
    "lastPage": 1,
    "total": 1,
    "perPage": 1
  }
}