Include Date/Time Value for Last Modified Date or Created Date in Salesforce Reports

The workaround is to create a formula field of type Date/Time on the field that is only displaying the date value.

Create a Date/Time Formula Field in Lightning

Follow these steps to create a new formula field in Salesforce Lightning:

1. Navigate to Setup | Object Manager.
2. Select the desired object (for example, the Opportunity object).
3. Select Fields & Relationships and click New to create a new field.
4. Select the Data Type Formula and click Next.
5. Name your new field, select the Formula Return Type as Date/Time, and click Next.
6. In the formula editor, click Insert Field and locate the desired field such as Created Date or Last Modified Date, then click Insert. (Screenshot: The Insert Field dialog in the formula editor with Created Date selected.)
7. Finish creating the field — add a Description and Help Text, then click Next.
8. Assign the desired field-level security and click Next.
9. Click Save.
10. Create a new report or edit your existing report to add this new formula field.
11. If necessary, add the new field to the layouts of any custom report types.