diff --git a/data/articles/css-performance-test-flexbox-vs-table.json b/data/articles/css-performance-test-flexbox-vs-table.json
index 2460e677..ebc84186 100644
--- a/data/articles/css-performance-test-flexbox-vs-table.json
+++ b/data/articles/css-performance-test-flexbox-vs-table.json
@@ -1,7 +1,7 @@
 {
   "name" : "CSS performance test: Flexbox v CSS Table – Fight!",
   "author": "Ben Frain",
-  "date": "26. March 2014",
+  "date": "2014-03-26",
   "stats": {
     "length": 1264
   },
diff --git a/data/articles/improving-smashing-magazines-performance b/data/articles/improving-smashing-magazines-performance.json
similarity index 90%
rename from data/articles/improving-smashing-magazines-performance
rename to data/articles/improving-smashing-magazines-performance.json
index a4e78713..d64f1aa7 100644
--- a/data/articles/improving-smashing-magazines-performance
+++ b/data/articles/improving-smashing-magazines-performance.json
@@ -1,7 +1,7 @@
 {
   "name" : "Improving Smashing Magazine’s Performance: A Case Study",
   "author": "Vitaly Friedman",
-  "date": "8. September 2014",
+  "date": "2014-09-08",
   "stats": {
     "length": 8451
   },
diff --git a/data/slides/http2-all-the-things.json b/data/slides/http2-all-the-things.json
index 98a40c9b..1a5ceaca 100644
--- a/data/slides/http2-all-the-things.json
+++ b/data/slides/http2-all-the-things.json
@@ -1,7 +1,7 @@
 {
   "name": "HTTP/2 all the things",
   "author": "Ilya Grigorik",
-  "date": "15. November 2014",
+  "date": "2014-11-15",
   "stats": {
     "length": 47
   },
diff --git a/data/slides/is-tls-fast-yet.json b/data/slides/is-tls-fast-yet.json
index fed01169..627a10ed 100644
--- a/data/slides/is-tls-fast-yet.json
+++ b/data/slides/is-tls-fast-yet.json
@@ -6,5 +6,5 @@
     "length": 44
   },
   "tags": ["network", "authentication", "data integrity", "encryption"],
-  "url" : "https://docs.google.com/presentation/d/1BH9DI1XlmukCzU2i8OvxLIfgQf_aGlZgZyvWDSyYyzs/present?slide=id.ge02bf84a_0546"
+  "url" : "https://docs.google.com/presentation/d/1BH9DI1XlmukCzU2i8OvxLIfgQf_aGlZgZyvWDSyYyzs/present"
 }
diff --git a/data/slides/webperf-landia.json b/data/slides/webperf-landia.json
index 9870e1df..aad9821e 100644
--- a/data/slides/webperf-landia.json
+++ b/data/slides/webperf-landia.json
@@ -1,6 +1,7 @@
 {
   "name": "News from webperf-landia",
   "author": "Ilya Grigorik",
+  "date": "2014-09-21",
   "stats": {
     "length": 38
   },