I think you're fine. The guidelines also say: > Please don't use HN primarily for promotion. It's ok to post your own stuff part of the time, but the primary u

I think you're fine. The guidelines also say: > Please don't use HN primarily for promotion. It's ok to post your own stuff part of the time, but the primary use of the site should be for curiosity. I also think the old epochconverter UI was dated. I'll switch to yours