Re: Year to date
I must disagree.
Use the hyphens with year-to-date.
It's how it's listed here: Year-to-Date financial definition of Year-to-Date. Year-to-Date finance term by the Free Online Dictionary. and here: Year-To-Date Definition, two sources I would trust, as well as in the content on numerous other sites.
They don't look old-fashioned. They look correct.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.