When searching in JQL using the "Create Date Between" filter, JIRA is considering only the Start date, not the End date. It considers one day before the end date.

Steps to replicate:

Example 1:

• Create one issue today (let's say today is Aug 9th);
• Create a JQL (basic or advanced, doesn't matter) to search issues from Aug 7th to Aug 9th (created >= 2014-08-07 AND created <= 2014-08-09);
• The issue will not appear in the results.

Example 2:

• Create one issue today (let's say today is Aug 9th);
• Create a JQL (basic or advanced, doesn't matter) to search issues from Aug 7th to Aug 10th (created >= 2014-08-07 AND created <= 2014-08-10);
• The issue will appear in the results.

Example 3:

• Create one issue today (let's say today is Aug 9th);
• Create a JQL (basic or advanced, doesn't matter) to search issues from Aug 9th to Aug 10th (created >= 2014-08-09 AND created <= 2014-08-10);
• The issue will appear in the results.

Expected behavior:

This should work in any of the scenarios above.