see my comment bellow. Alternatively we have a cache of the hour elements which could be used to find the element to scroll to.

https://github.com/mozilla-b2g/gaia/blob/master/apps/calendar/js/views/day_based.js#L218

```js
this.hours.items[0]; // find first hour
// of course you still need to check if there are events inside the hour but you can use .calendarIds
```