How To Get Correct Output Of Hour: "2-digit" For ToLocaleString("en-US") With AM/PM?

According to the toLocaleString() MDN Documentation the option hour: '2-digit' should return a 2 digit representation of the hour, but it returns only 1 digit if the locale is en-U

Solution 1:

You just have to explicitly disable the 12 hour representation in the options :

    let d = new Date("2019-05-03 15:00:00").toLocaleString("en-US", {hour: "2-digit", minute: "2-digit", hour12: false});
    console.log(d);

The 2 digits parameter might be related to padding, but I don't think it's absolutely necessary. I would consider removing it.

    let d = new Date("2019-05-03 15:00:00").toLocaleString("en-US", {hour12: false});
    console.log(d);