My advice as a native English speaker here: In my entire life, I've only seen or heard "till" in the following contexts, given in order of frequency: 1 A cash

My advice as a native English speaker here: In my entire life, I've only seen or heard "till" in the following contexts, given in order of frequency: 1 A cash register (noun) 2 In very poorly constructed resumes 3 In the farming sense (verb) 4 In internet forums alongside poorly written English 5 Shakespeare and other literature from several centuries ago. So my advice: unless you're a time traveller, use "until".