diff --git a/src/components/ChallengeEditor/index.js b/src/components/ChallengeEditor/index.js
index d524b764..7aeab5e1 100644
--- a/src/components/ChallengeEditor/index.js
+++ b/src/components/ChallengeEditor/index.js
@@ -879,7 +879,9 @@ class ChallengeEditor extends Component {
     }
     challenge.phases = challenge.phases.map((p) => pick([
       'duration',
-      'phaseId'
+      'phaseId',
+      'scheduledStartDate',
+      'scheduledEndDate'
     ], p))
     if (challenge.terms && challenge.terms.length === 0) delete challenge.terms
     delete challenge.attachments
diff --git a/src/util/date.js b/src/util/date.js
index 29030d96..cf5d5205 100644
--- a/src/util/date.js
+++ b/src/util/date.js
@@ -109,6 +109,7 @@ export const updateChallengePhaseBeforeSendRequest = (challengeDetail) => {
   const hourToSecond = 60 * 60
   if (challengeDetail.phases) {
     const challengeDetailTmp = _.cloneDeep(challengeDetail)
+    challengeDetailTmp.startDate = challengeDetail.phases[0].scheduledStartDate
     challengeDetailTmp.phases = challengeDetailTmp.phases.map((p) => ({
       duration: p.duration * hourToSecond,
       phaseId: p.phaseId,