After searching the web community for an event filter between two dates I decided to write this tutorial to help others like me who had a some challenges finding how to do it.

It is tempting to believe that using the "is between" on a date fields will work. However, this option is used only in the case of events "Starting" on a rage of date.

This module (https://www.drupal.org/project/views_between_dates_filter) is used to filter evenst on ONE date and NOT a range of date (as the image suggest).

The following conversations have guided me to this tutorial.
https://www.drupal.org/node/1302940
http://drupal.stackexchange.com/questions/36380/drupal-7-views-filter-be...

This tutorial requires that you already have a content type with a date field . It is not necessary to have two fields to adjust an "end date" for the event, only a date field with the "Collect an end date."

This part (which seems "logical" to start - but it is not so much) is the basis of this discussion.
Take for example this figure, based on the discussion of https://www.drupal.org/node/1302940

A search filter between the 1th and 31th of July should provide us the events A, B, C and D (shaded area), and Exclude E and F.

If we have a filter with a Date field (based on the Start date) using the option "is between" will only show B and C since their "start date" is between those dates, but will exclude events A and D since their "start date" is before the desired search . This is not the desired result, we want to include them in the results.

The following conversation https://www.drupal.org/node/1302940 explains:

event end date >= user start date
AND
event start date <= user end date

Following this, we must swap the "Start date" and "End date" to the users. Users will not notice but it is crucial to obtaining the desired results.

To include events A and D in this search, we will need two filters exposed to our Views (again: based on the same field and not two separate fields)
In this order:

1. Date - end date (field_dates:value2)
2. Date - start date (field_dates)

In " Date - end date (field_dates:value2)", Select popup as form element,

Next window:
Exposed this filter to visitor

Even though this label says "End date", we are going to make believe this is the "Start date", so change this label to "Start Date" instead.

Change the operator to "Is greater than or equal to", leave the "Select a date" as is. (event end date >= user start date)

Do the same to the second filter:

Date - start date (field_dates)
- change this label to "End Date",
- Select popup as form element,
- Exposed this filter to visitor

This time Change to operator to "Is less than or equal to", leave the "Select a date" as is. (event start date <= user end date)

Last suggestion: Make sure that you have "AND" between those two operators.

Save everything, Enjoy...

Hope this helps someone along the Drupal mystical path.. Sorry for any typo or grammatical mistake, English is not my native language.

Feel free to comment or correct me, I'll adjust.