Fix typo

docs/UserGuide.md

@@ -458,7 +458,7 @@ the command will be shown for the given department.
 * The given date must not be before the current date of inputting the command and must be within one year
 of the current date of inputting the command.
 * The date will be deemed invalid if it does not follow the form YYYY-MM-DD or if the date is not within the range
-specifed above.
+specified above.
 
 <div markdown="span" class="alert alert-warning">**NOTE:**
 The input date must be of the form YYYY-MM-DD