This is why you don’t ask.
Also, you don’t really need a whole day. I’m also Canadian. Employers are required to allow you time to do it, not an entire day.
I would phrase the question like this: “I need to take time to go vote. Would you prefer I take the morning or afternoon off?”
If they so no to both, you say “you know it’s illegal not to allow me time off to vote, right?”
I’ve changed careers since the last election, but as a driver I’d just say “I’m going to swing by the polling place in my way to or back from wherever” and it was never a problem.
I mean you do have options. We have the labour board here in Canada.
You don’t tell your employer you’re talking to them. You let them contact the employer. They can’t fire you while an investigation is ongoing.