diff --git a/modules/gcal/client.go b/modules/gcal/client.go
index 590ed8d4..355f7eb6 100644
--- a/modules/gcal/client.go
+++ b/modules/gcal/client.go
@@ -56,7 +56,7 @@ func (widget *Widget) Fetch() ([]*CalEvent, error) {
 	startTime := fromMidnight().Format(time.RFC3339)
 	eventLimit := int64(widget.settings.eventCount)
 
-	timezone := widget.settings.timeZone
+	timezone := widget.settings.timezone
 
 	for _, calendarId := range calendarIds {
 		calendarEvents, err := srv.Events.List(calendarId).TimeZone(timezone).ShowDeleted(false).TimeMin(startTime).MaxResults(eventLimit).SingleEvents(true).OrderBy("startTime").Do()
diff --git a/modules/gcal/settings.go b/modules/gcal/settings.go
index bdc41509..fbf2b64e 100644
--- a/modules/gcal/settings.go
+++ b/modules/gcal/settings.go
@@ -9,27 +9,27 @@ const defaultTitle = "Calendar"
 
 type colors struct {
 	day         string
-	description string `help:"The default color for calendar event descriptions." values:"Any X11 color name." optional:true`
-	past        string `help:"The color for calendar events that have passed." values:"Any X11 color name." optional:true`
-	title       string `help:"The default colour for calendar event titles." values:"Any X11 color name." optional:true`
+	description string `help:"The default color for calendar event descriptions." values:"Any X11 color name." optional:"true"`
+	past        string `help:"The color for calendar events that have passed." values:"Any X11 color name." optional:"true"`
+	title       string `help:"The default colour for calendar event titles." values:"Any X11 color name." optional:"true"`
 
-	highlights []interface{} `help:"A list of arrays that define a regular expression pattern and a color. If a calendar event title matches a regular expression, the title will be drawn in that colour. Over-rides the default title colour." values:"An array of a valid regular expression, any X11 color name." optional:true`
+	highlights []interface{} `help:"A list of arrays that define a regular expression pattern and a color. If a calendar event title matches a regular expression, the title will be drawn in that colour. Over-rides the default title colour." values:"An array of a valid regular expression, any X11 color name." optional:"true"`
 }
 
 type Settings struct {
 	colors
 	common *cfg.Common
 
-	conflictIcon          string `help:"The icon displayed beside calendar events that have conflicting times (they intersect or overlap in some way)." values:"Any displayable unicode character." optional:true`
-	currentIcon           string `help:"The icon displayed beside the current calendar event." values:"Any displayable unicode character." optional:true`
-	displayResponseStatus bool   `help:"Whether or not to display your response status to the calendar event." values:"true or false" optional:true`
+	conflictIcon          string `help:"The icon displayed beside calendar events that have conflicting times (they intersect or overlap in some way)." values:"Any displayable unicode character." optional:"true"`
+	currentIcon           string `help:"The icon displayed beside the current calendar event." values:"Any displayable unicode character." optional:"true"`
+	displayResponseStatus bool   `help:"Whether or not to display your response status to the calendar event." values:"true or false" optional:"true"`
 	email                 string `help:"The email address associated with your Google account. Necessary for determining 'responseStatus'." values:"A valid email address string."`
-	eventCount            int    `help:"The number of calendar events to display." values:"A positive integer, 0..n." optional:true`
-	multiCalendar         bool   `help:"Whether or not to display your primary calendar or all calendars you have access to." values:"true or false" optional:true`
+	eventCount            int    `help:"The number of calendar events to display." values:"A positive integer, 0..n." optional:"true"`
+	multiCalendar         bool   `help:"Whether or not to display your primary calendar or all calendars you have access to." values:"true or false" optional:"true"`
 	secretFile            string `help:"Your Google client secret JSON file." values:"A string representing a file path to the JSON secret file."`
-	showDeclined          bool   `help:"Whether or not to display events you’ve declined to attend." values:"true or false" optional:true`
+	showDeclined          bool   `help:"Whether or not to display events you’ve declined to attend." values:"true or false" optional:"true"`
 	withLocation          bool   `help:"Whether or not to show the location of the appointment." values:"true or false"`
-	timeZone              string `help:"Time zone used in the calendar." values:"A valid time zone string"`
+	timezone              string `help:"The time zone used to display calendar event times." values:"A valid TZ database time zone string" optional:"true"`
 }
 
 func NewSettingsFromYAML(name string, ymlConfig *config.Config, globalConfig *config.Config) *Settings {
@@ -40,13 +40,13 @@ func NewSettingsFromYAML(name string, ymlConfig *config.Config, globalConfig *co
 		conflictIcon:          ymlConfig.UString("conflictIcon", "🚨"),
 		currentIcon:           ymlConfig.UString("currentIcon", "🔸"),
 		displayResponseStatus: ymlConfig.UBool("displayResponseStatus", true),
-		email:         ymlConfig.UString("email", ""),
-		eventCount:    ymlConfig.UInt("eventCount", 10),
-		multiCalendar: ymlConfig.UBool("multiCalendar", false),
-		secretFile:    ymlConfig.UString("secretFile", ""),
-		showDeclined:  ymlConfig.UBool("showDeclined", false),
-		withLocation:  ymlConfig.UBool("withLocation", true),
-		timeZone:      ymlConfig.UString("timeZone", ""),
+		email:                 ymlConfig.UString("email", ""),
+		eventCount:            ymlConfig.UInt("eventCount", 10),
+		multiCalendar:         ymlConfig.UBool("multiCalendar", false),
+		secretFile:            ymlConfig.UString("secretFile", ""),
+		showDeclined:          ymlConfig.UBool("showDeclined", false),
+		withLocation:          ymlConfig.UBool("withLocation", true),
+		timezone:              ymlConfig.UString("timezone", ""),
 	}
 
 	settings.colors.day = ymlConfig.UString("colors.day", "forestgreen")