diff --git a/content/challenges/50.md b/content/challenges/50.md
index 903f1d4..fe895ed 100644
--- a/content/challenges/50.md
+++ b/content/challenges/50.md
@@ -43,7 +43,7 @@ japanese:
         text:
           - 襲: おそ
           - いかかる
-date: February 8, 2022
+date: 2022-02-08
 ---
 
 This week's challenge is from the lyrics of [優]{やさ}しい[彗]{すい}[星]{せい} ([YouTube](https://www.youtube.com/watch?v=VyvhvlYvRnc)):