I'm pretty sure "24h" is supposed to display as "1d".

I have look at my repost

The site actually calculates when the comment was made, so it does that to show if it's actually been that amount of time since the comment.

So some comments(or posts) you may find might say that. This also happens in the memchat as well

Yeah imgflip time is weird like that. Let’s say that I make a meme at 2:06 PM for example, when it’s 3:06 it’ll say that it was made an hour ago. However, when it hits 4 it’ll say that it was made two hours ago, even though there’s still 6 minutes before it’s supposed to say that.