I did not look at your app, but the following might get you started.
Code:
Dim oApp As New Outlook.Application
Dim oNamespace As Outlook.NameSpace
'Dim oAccounts As Outlook.Accounts
'Dim oAccount As Outlook.account
Dim intCount As Integer
intCount = 1
Dim oExplorer As Outlook.Explorer
Dim oCalendarModule As Outlook.CalendarModule
Dim oNavigationFolders As Outlook.NavigationFolders
Dim oNavigationFolder As Outlook.NavigationFolder
Dim oNavigationGroup As Outlook.NavigationGroup
Dim myFolder As Outlook.Folder
Set oNamespace = oApp.Session
'Dim varItem As Variant
'
'Set varItem = oNamespace.GetDefaultFolder(olFolderCalendar)
'Debug.Print varItem.Name
'Debug.Print TypeName(varItem)
Set oExplorer = oNamespace.GetDefaultFolder(olFolderCalendar).GetExplorer
Set oCalendarModule = oExplorer.NavigationPane.Modules.GetNavigationModule(olModuleCalendar)
Set oNavigationGroup = oCalendarModule.NavigationGroups.Item("My Calendars")
For Each oNavigationFolder In oNavigationGroup.NavigationFolders
Debug.Print TypeName(oNavigationFolder) & " item " & intCount
Debug.Print oNavigationFolder.Folder.FullFolderPath
Set myFolder = oNavigationFolder.Folder
Debug.Print myFolder.GetCalendarExporter.StartDate
intCount = intCount + 1
Next oNavigationFolder
Set myFolder = Nothing
Set oNavigationGroup = Nothing
Set oCalendarModule = Nothing
Set oExplorer = Nothing
Set oNamespace = Nothing
Set oApp = Nothing