The ongoing notifications of Business Calendar 2 gives you the information about upcoming events and the time remaining. It constantly reminds you about the upcoming events and will not disappear from the notification drawer.
1. To activate the ongoing notification, please open the Business Calendar 2 navigation drawer and hit → Settings
2. Select → Reminder here
3. Tap on → Ongoing notification
4. Here you can activate/deactivate the notification, select specific calendars or setup further details