--- a/pkg/common/attributes.go	Mon Jan 28 20:35:14 2019 +0100
+++ b/pkg/common/attributes.go	Tue Jan 29 08:28:50 2019 +0100
@@ -20,6 +20,11 @@
 	"time"
 )
 
+const (
+	TimeFormat = "2006-01-02T15:04:05"
+	DateFormat = "2006-01-02"
+)
+
 type (
 
 	// Attributes is a map of optional key/value attributes
@@ -103,7 +108,23 @@
 	return ca.Set(key, v)
 }
 
-const TimeFormat = "2006-01-02T15:04:05"
+func (ca Attributes) Date(key string) (time.Time, bool) {
+	s, found := ca.Get(key)
+	if !found {
+		return time.Time{}, false
+	}
+	d, err := time.Parse(DateFormat, s)
+	if err != nil {
+		log.Printf("error: %v\n", err)
+		return time.Time{}, false
+	}
+	return d, true
+}
+
+func (ca Attributes) SetDate(key string, date time.Time) bool {
+	s := date.Format(DateFormat)
+	return ca.Set(key, s)
+}
 
 // Time gives a time.Time for a given key.
 func (ca Attributes) Time(key string) (time.Time, bool) {