If you want your content editor to see certain Time zone values, you need to setup the ServerTimeZone in sitecore.config file.
This is specially important if your server is located in a different time zone. For example you are in Azure PaaS and servers are in all over the world. Default value it will show is the UTC. But to change that to a certain zone (Central, Pacific, Eastern), you should change the ServerTimeZone. This will show the content editors the time they are used to.
Here is an example from Sitecore.
<setting name="ServerTimeZone" value="Central Time Zone"/> Helpful link is below. https://doc.sitecore.com/xp/en/developers/93/sitecore-experience-manager/settings-supporting-utc-implementation.html