Retrieving logon instances in SAP systems

Can I retrieve the time a user was logged on to SAP on a certain date?

You can get only the last login time and date using the following method:
1. Run transaction SUIM
2. Expand the user tree
3. Click on 'by logon date and password change'
4. Insert the user name you wish to get the required detail
5. Execute

You will get the list of users according to logon date and time.

Note: You can get the same result using the tcode 'RSUSR200' in SAP NetWeaver.