The Calendar is scrolled on the APP Calendar Page. The very top of the Calendar page shows the forthcoming Shabbat start and end times, and parashah.
The Calendar contains all Shabbat, Chag and minor chag details. You can click an entry to get more detail of that entry. The display scrolls on the screen in months.
The Shabbat start and end times are shown for the location or region that you select in the Settings page 'Shabbat Times' area.
There are multiple reputable sources of Shabbat times. These sources can vary by a few minutes. The Board recommends you consult with your Synagogue for the best times to suit you.