Change your 

BlackBerry Hub+ Calendar

 settings

Calendar view 

To display light text on a dark background, turn on the 
Dark theme
 switch.
To show events in your calendar that you decline, turn off the 
Hide declined events
 switch.
To change which day the week starts on, tap 
Start of the week
, and then tap an option.
To show the Chinese Lunar Calendar, turn on the 
Show Chinese lunar calendar
 switch. 

Normal Working Hours

To change the time that your work day starts or ends, tap 
Work day start
 or 
Work day end
. Tap a time, and then tap 
OK
.

To change which day your work week starts on, tap 
Start of the work week
, and then tap an option.
To change how many days are in your work week, tap 
Length of the work week
, and then tap an option.

Time zone

To view calendar events in a different time zone, turn off the 
Use device time zone
 switch. Tap 
Time zone
. Enter a country name, and then tap a time zone.
To stop receiving a notification when your device changes time zones, clear the 
Show time zone switch notification
 checkbox.

Meetings

To silence your device notifications during meetings, tap 
Meeting mode 
and turn the 
Meeting mode 
switch on. Then tap an option below. 
To set a calendar that appears as the default when you create a new event, tap 
Default calendar
, and then, under a calendar, tap 
Events
.
To change the default time for your meeting reminders, tap 
Default meeting reminder
, and then tap a time.
To change the default time before a snoozed meeting reminder reappears, tap 
Default reminder snooze
, and then tap a time.

Notifications

To stop receiving a notification for event reminders, turn off the 
Show notification dot
 switch.
To receive event reminders in a notification that stays on the screen until you dismiss or snooze it, turn on the 
Override Do Not Disturb
 switch.
To select the sound for event reminders, tap 
Sound
. Tap an option, and then tap 
OK
.
To make your device vibrate when you receive an event reminder, turn on the 
Vibrate
 switch.