--- a/pkg/models/common.go	Mon Jan 28 20:35:14 2019 +0100
+++ b/pkg/models/common.go	Tue Jan 29 08:28:50 2019 +0100
@@ -20,6 +20,8 @@
 	"fmt"
 	"strings"
 	"time"
+
+	"gemma.intevation.de/gemma/pkg/common"
 )
 
 var (
@@ -30,8 +32,6 @@
 // WGS84 is the EPSG of the World Geodetic System 1984.
 const WGS84 = 4326
 
-const DateFormat = "2006-01-02"
-
 type (
 	Date struct{ time.Time }
 	// Country is a valid country 2 letter code.
@@ -41,7 +41,7 @@
 )
 
 func (srd Date) MarshalJSON() ([]byte, error) {
-	return json.Marshal(srd.Format(DateFormat))
+	return json.Marshal(srd.Format(common.DateFormat))
 }
 
 func (srd *Date) UnmarshalJSON(data []byte) error {
@@ -49,7 +49,7 @@
 	if err := json.Unmarshal(data, &s); err != nil {
 		return err
 	}
-	d, err := time.Parse(DateFormat, s)
+	d, err := time.Parse(common.DateFormat, s)
 	if err == nil {
 		*srd = Date{d}
 	}