Online casino time zone issues: why do schedules show wrong times?

always get confused when i check promo times or tournament schedules and the start/end times look way off for me. i’m on central time but sometimes it’s clearly showing utc or some other random zone with no option to change it. feels like a pretty basic thing for a site to fix but it happens on more than one place i play. maybe it’s set to where their HQ is or something? weird when your bonus expires but the timer’s hours off.

is this just a lazy coding thing or do most people just ignore it and deal with the mental math? anyone figured out a fix or some hack for this?