Hello, Steven Tay
a) Dashboard > Posts > quick edit – https://prnt.sc/uaE7v8n-Vz5o or Dashboard > Posts > click on post name to open editor > edit date here – https://prnt.sc/u217qNH53B6Q
b) Dashboard > Posts > click on post name to open editor > https://prnt.sc/kUrwyyNqws8K
c) Dashboard > Users > find a user who created the post > change email
Kind Regards, 8theme team
