# A Head for a Day with Oleh Teteriatnyk

> A full working day on one problem. We take it apart, put it back in the right order, and you finish with a plan you can hand your team the next morning. Most often, this is me running a strategy session with your team. One-to-one works too. Tell me which when you book. Scoped and priced as a day, so nothing gets padded.

- Host: Oleh Teteriatnyk
- Duration: 540 min
- Location: Google Meet
- Host time zone: Europe/London
- Confirmation: Bookings are confirmed instantly.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/diroleh/a-head-for-a-day
- Event type id: 6947950

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6947950&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

```http
POST https://api.cal.com/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 6947950,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "Your-website-or-Instagram": "…",
    "attendeePhoneNumber": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `Your-website-or-Instagram` (Your website or Instagram)
- Optional fields: `attendeePhoneNumber` (Phone number), `notes` (Additional notes), `guests` (Add guests)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.