Hi Loed,
Try this,
1. Edit the query and apply a prompt on <Transaction date> object.
2. Choose the operator as "Between". This will give two parameter fields: start and end.
3. As it is a date prompt, user should get calendar option to choose dates as far as i am sure.
4. User can choose start date as 20160201 & end date as 20160229 and run the query.
Regards,
Yuvraj