In the participants tab of the People section of EHQ the Other filter can be used to find participants between two dates. In this example, to search for participants who joined between the 1st of January 2018 and the 10th of January 2018, first click on the Other filter as shown below.
Select the Joined check box and add a before date. In this example before 10th Jan. Click Add.
Similarly, select after and enter the date and click Add. This will create a filter for the date range as shown below.
Note - The filters "Before" and "After" include the day itself for filtering the participants.