diff --git a/defaults.go b/defaults.go
index c87ebbb..f4e91d1 100644
--- a/defaults.go
+++ b/defaults.go
@@ -55,6 +55,10 @@ const (
 
 	// DefaultDateFormat is the default date format.
 	DefaultDateFormat = "2006-01-02"
+	// DefaultDateHourFormat is the date format for hour timestamp formats.
+	DefaultDateHourFormat = "01-02 3pm"
+	// DefaultFloatFormat is the default float format.
+	DefaultFloatFormat = "%.2f"
 )
 
 var (
@@ -67,7 +71,7 @@ var (
 	// DefaultCanvasColor is the default chart canvas color.
 	// It is equivalent to css color:white.
 	DefaultCanvasColor = drawing.Color{R: 255, G: 255, B: 255, A: 255}
-	// DefaultCanvasStrokColor is the default chart canvas stroke color.
+	// DefaultCanvasStrokeColor is the default chart canvas stroke color.
 	// It is equivalent to css color:white.
 	DefaultCanvasStrokeColor = drawing.Color{R: 255, G: 255, B: 255, A: 255}
 	// DefaultTextColor is the default chart text color.
diff --git a/value_formatter.go b/value_formatter.go
index 4a59974..4902125 100644
--- a/value_formatter.go
+++ b/value_formatter.go
@@ -13,6 +13,11 @@ func TimeValueFormatter(v interface{}) string {
 	return TimeValueFormatterWithFormat(v, DefaultDateFormat)
 }
 
+// TimeHourValueFormatter is a ValueFormatter for timestamps.
+func TimeHourValueFormatter(v interface{}) string {
+	return TimeValueFormatterWithFormat(v, DefaultDateHourFormat)
+}
+
 // TimeValueFormatterWithFormat is a ValueFormatter for timestamps with a given format.
 func TimeValueFormatterWithFormat(v interface{}, dateFormat string) string {
 	if typed, isTyped := v.(time.Time); isTyped {
@@ -29,7 +34,7 @@ func TimeValueFormatterWithFormat(v interface{}, dateFormat string) string {
 
 // FloatValueFormatter is a ValueFormatter for float64.
 func FloatValueFormatter(v interface{}) string {
-	return FloatValueFormatterWithFormat(v, "%.2f")
+	return FloatValueFormatterWithFormat(v, DefaultFloatFormat)
 }
 
 // FloatValueFormatterWithFormat is a ValueFormatter for float64 with a given format.