In Outlook you are able to add additional Time Zones to your Calendar view. To add an additional Time Zone to your Calendar go to View > Time Scale > Change Time Zone
Figure 1: Time scale, Change time zone drop down
You will be presented with the Outlook options and the Calendar options will already be selected.
Check the Show Second Time Zone option, and from the drop down menu choose which Time Zone.
Figure 2: Calendar options
Now the additional Time Zone will be displayed when viewing the Calendar