diff --git a/README.md b/README.md
index b47ab9fce..6c3c68b31 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,9 @@
 * [Redirect to URL](#redirect-to-url)
 * [Scroll to top](#scroll-to-top)
 
+### Date
+* [Get days difference between dates](#get-days-difference-between-dates)
+
 ### Function
 * [Chain asynchronous functions](#chain-asynchronous-functions)
 * [Curry](#curry)
@@ -557,6 +560,18 @@ const scrollToTop = _ => {
 // scrollToTop()
 ```
 
+[⬆ back to top](#table-of-contents)
+## Date
+
+### Get days difference between dates
+
+Calculate the difference (in days) between to `Date` objects.
+
+```js
+const getDaysDiffBetweenDates = (dateInitial, dateFinal) => (dateFinal - dateInitial) / (1000 * 3600 * 24);
+//getDaysDiffBetweenDates(new Date("2017-12-13"), new Date("2017-12-22")) -> 9
+```
+
 [⬆ back to top](#table-of-contents)
 ## Function
 
diff --git a/tag_database b/tag_database
index 5619a0369..a8d4fa8dd 100644
--- a/tag_database
+++ b/tag_database
@@ -28,6 +28,7 @@ fill-array:array
 filter-out-non-unique-values-in-an-array:array
 flatten-array-up-to-depth:array
 flatten-array:array
+get-days-difference-between-dates:date
 get-max-value-from-array:array
 get-min-value-from-array:array
 get-native-type-of-value:utility