1. Go Administration > Batch > Batch Entry
2. Click Add and begin a Membership Dues Batch
3. Enter your records that need to be expired. Set the transaction date for one day prior to the current date and select to Renew their membership
4. Change the expiration date on all of the records to on or before the current date. 
NOTE: Your expiration date cannot be before your transaction date. 
5. Commit the batch
6. Go to Administration > Global Changes
7. Select your Nightly update membership statuses and use the dropdown arrows to Run it
(OPTIONAL: You could wait for it to run as scheduled and the next day these memberships will have expired)