You need backticks surrounding the string there in order for the interpreter to properly interpret it as a template literal.
let someVar = 'Happy';
console.log(`I hope you have a ${someVar} day.`);
When you have a normal string, you can use single quotes ' or double quotes ", but when you're using a template literal, you must always use backticks `.
You can also use backticks anyway even if you aren't interpolating any variables inside, just so you don't have to escape quote characters, for example.
