Happy Birthday John Turkey

https://mander.xyz/post/32743892

What exactly is that last phrase supposed to modify? I find that syntax confusing. Is that ironic or intentional?
I think the joke is that 110.000 years is very precise, but that precision isn’t very useful when you only identify where that measurement zeroes as vaguely as “sometime this week”.
I get and appreciate that joke. I actually meant the last phrase of the quote (the unintended irony of my question’s vagueness now noted!), “which can always be made more precise.”