Calendar Custom Rendering
On a Calendar, a MultiTableTemplate draws one table's rows in place of their time, subject and place — in React, an entry of templates — and TooltipTemplate (appointmentTooltip) says what each tooltip shows. Both have the row's whole record at hand, so each table can show what matters about it.
Schmeler and Sons' calendar
The account's appointments, tasks and phone calls, a month at a time. Tasks and phone calls are drawn by templates of their own, and appointments as the calendar draws them. The view names the columns the templates and tooltips show, so the calendar reads them with each row.