diff --git a/chapters/data-formats.adoc b/chapters/data-formats.adoc
index b09ffed2a..c2f497697 100644
--- a/chapters/data-formats.adoc
+++ b/chapters/data-formats.adoc
@@ -129,7 +129,7 @@ more effort to parse, avoid this ambiguity.
 
 When choosing between `date` and `datetime` formats you should take into account the following:
 
-* `date` should be used for properties where no exact point in time is not required and day time-range is sufficient,
+* `date` should be used for properties where no exact point in time is required and day time-range is sufficient,
 for instance, document dates, birthdays, ETAs (estimated time of arrival).
 Without further context, `date` without time implies the time period from midnight to midnight in the local time zone.
 However, the timezone information can be also provided