Add comma

cpursley · cpursley · commit 23520f84a330 · 2015-04-25T12:23:17.000-04:00
diff --git a/chapters/dates_and_times/days-between-two-dates.md b/chapters/dates_and_times/days-between-two-dates.md
@@ -5,7 +5,7 @@ chapter: Dates and Times
 ---
 ## Problem
 
-You need to find how many seconds minutes, hours, days, months or years has passed between two dates.
+You need to find how many seconds, minutes, hours, days, months or years has passed between two dates.
 
 ## Solution
 
