I539 Approval notice issue

Hello Everyone,

I had applied for a Change of status from H1B to B2 in April 2020. I got my biometrics done in NOV 2020. An RFE in Dec 2020. I got my case approved on Jan 7th with a validity of one day. I am really confused about the situation. Valid date shows 01/07/2021 - 01/08/2021. I have put in a service request because one day isn’t enough to pack up and exit. Let me know if anyone has been in same situation. Thanks