diff --git a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.md b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.md
index 83eeaaa5d00..1ac67253093 100644
--- a/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.md
+++ b/curriculum/challenges/english/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.md
@@ -19,7 +19,7 @@ Here's an example:
 
 # --instructions--
 
-Camper Cat's Mortal Kombat survey results are in! Wrap a `time` tag around the text `Thursday, September 15<sup>th<sup>` and add a `datetime` attribute to it set to `2016-09-15`.
+Camper Cat's Mortal Kombat survey results are in! Wrap a `time` tag around the text `Thursday, September 15<sup>th</sup>` and add a `datetime` attribute to it set to `2016-09-15`.
 
 # --hints--