Format invalid date in blog posts (#8861)

content/en/blog/_posts/2018-03-26-kubernetes-1.10-stabilizing-storage-security-networking.md

@@ -2,6 +2,7 @@
 title: 'Kubernetes 1.10: Stabilizing Storage, Security, and Networking '
 author: kbarnard
 tags:
+date: 2018-03-26
 modified_time: '2018-03-27T11:01:39.569-07:00'
 blogger_id: tag:blogger.com,1999:blog-112706738355446097.post-6519705795358457586
 blogger_orig_url: http://blog.kubernetes.io/2018/03/kubernetes-1.10-stabilizing-storage-security-networking.html

content/en/blog/_posts/2018-04-11-migrating-the-kubernetes-blog.md

@@ -1,6 +1,7 @@
 ---
 title: 'Migrating the Kubernetes blog'
 author: zcorleissen
+date: 2018-04-11
 slug: migrating-the-kubernetes-blog
 date: 2018-04-11
 ---

content/en/blog/_posts/2018-04-24-kubernetes-application-survey-results-2018.md

@@ -1,6 +1,7 @@
 ---
 title: 'Kubernetes Application Survey 2018 Results'
 author: mattfarina
+date: 2018-04-24
 slug: kubernetes-application-survey-results-2018
 date: 2018-04-24
 ---

content/en/blog/_posts/2018-05-24-kubernetes-containerd-integration-goes-ga.md

@@ -1,7 +1,7 @@
 ---
 layout: blog
 title: Kubernetes Containerd Integration Goes GA
-date: Thursday, May 24, 2018
+date: 2018-05-24
 ---
 # Kubernetes Containerd Integration Goes GA
 **Authors**: Lantao Liu, Software Engineer, Google and Mike Brown, Open Source Developer Advocate, IBM

content/en/blog/_posts/2018-05-30-say-hello-to-discuss-kubernetes.md

@@ -1,7 +1,7 @@
 ---
 layout: blog
 title: Say Hello to Discuss Kubernetes
-date:  Wednesday, May 30, 2018
+date: 2018-05-30
 ---
 
 **Author**: Jorge Castro (Heptio)