diff --git a/src/plugins/worker/handlers.js b/src/plugins/worker/handlers.js
index 850b63d..0385077 100644
--- a/src/plugins/worker/handlers.js
+++ b/src/plugins/worker/handlers.js
@@ -73,6 +73,8 @@ module.exports = {
       .findOne({
         _id: app.transformStringIntoObjectId(data.layoutId)
       })
+    data.substitutions.run.startString =  moment.unix(data.substitutions.run.start).format("MMM YYYY")
+    data.substitutions.run.endString = moment.unix(data.substitutions.run.end).format("MMM YYYY")
 
     const outPath = path.join(__dirname, '../../certification/' + v4() + ".pdf")
     const document = {