Calendar Event Time TBD

Is there a way to get a single calendar event time to display as TBD? I've done it by using this code in a code block for the individual event. But the calendar view still displays the time.

<style>
.eventitem-meta-time { display: none !important; }
.eventitem-meta-date:after { content: "- Time TBD"; }
</style>

p.s. preferably without using the Advanced Header Code Injection because I don't have a Business or Commerce plan

Can you share link to page where you use calendar event? We can check easier