Public holidays, trading periods and key dates often live in a shared Google Calendar. twelfth can now read one directly.
In Settings → Calendars, choose Google Calendar, connect the account, then pick the calendar and the timezone. twelfth previews the events in range and links only when every one reads cleanly.
For a promotion calendar, give each event a SKU: … line for one product or an Affects: … line for a category, brand or supplier. Recurring events and cancellations carry through. See Calendars for the details.
