I see. I dont know if that works, as I haven't done that, but what worked for me was pointing to the tailnet IP, not the tailnet domain, then disabling expiry for my server on the tailscale dashboard so my IP would stay the same.
I think in combination with "The Sunday thread" it's unambiguous?
Perhaps, though I guess it could also be that there is "The Sunday thread" and "The Wednesday thread".
As for whether fortnightly is common or not, I think it is, but the other commenter suggests that only the Brits use the term. Fairly certain I've heard that from an Aussie friend though, could be that US Americans don't use the term.
Perhaps semimonthly is the most unambiguous term? That's what Mariam-Webster seems to suggest.
You'd certainly hope so, otherwise momma hedgehog would not have a great time during birth.