- Various fixes bugs and missing code in project's skeleton

meta/i18n/en/lean.date.json

@@ -5,6 +5,15 @@
     "week": "week"
   },
 
+  "interval": {
+    "years": "{$years} year(s)",
+    "months": "{$months} month(s)",
+    "days": "{$days} day(s)",
+    "hours": "{$hours} hour(s)",
+    "minutes": "{$minutes} minutes(s)",
+    "seconds": "{$seconds} second(s)"
+  },
+
   "month": {
     "list": [
       "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "Décember"