diff --git a/_posts/2019-08-29-comparing-oss-on-github.markdown b/_posts/2018-09-23-comparing-oss-on-github.markdown
similarity index 97%
rename from _posts/2019-08-29-comparing-oss-on-github.markdown
rename to _posts/2018-09-23-comparing-oss-on-github.markdown
index f017438..fc27838 100644
--- a/_posts/2019-08-29-comparing-oss-on-github.markdown
+++ b/_posts/2018-09-23-comparing-oss-on-github.markdown
@@ -1,6 +1,6 @@
 ---
 title: Comparing OSS on GitHub
-date: 2019-08-29 03:21:00 +09:00
+date: 2018-09-23 03:21:00 +09:00
 ---
 
 You are making a decision on which open source project you would adopt for your newly developing application.