🔥 A little JavaScript snippet here for if you want to modify a `Date` object and get back a Unix timestamp in seconds based on that modification.

modify-unix-time.js

/**
 * Take a base date, modify it with passed options and return back the number of seconds since Epoch time
 *
 * @param {Object} [options={}] Options for what you want to modify, follows the following format: { hours: 0, minutes: 0, seconds: 0 }
 * @returns {Number}
 */
const modifyUnixTime = (options = {}) => {
    // Create our modifications object by merging a static base with the passed options
    const modifications = Object.assign(
        { hours: 0, minutes: 0, seconds: 0 },
        options
    );

    const dateBase = new Date();

    // Run through each option and modify the time accordingly
    dateBase.setHours(dateBase.getHours() + modifications.hours);
    dateBase.setMinutes(dateBase.getMinutes() + modifications.minutes);
    dateBase.setSeconds(dateBase.getSeconds() + modifications.seconds);

    return Math.round(dateBase.getTime() / 1000);
};