How to use date-time - 3 common examples

exports.create = (req, res) => {

    const meetupCreate = {
        createdOn: dateTime(),
        location: req.body.location,
        topic: req.body.topic,
        happeningOn: req.body.happeningOn,
        tags: req.body.tags
    };
    db.query("INSERT INTO meetup (createdon, location, topic, happeningon, tags) VALUES ($1,$2,$3,$4,$5) returning *", [
        meetupCreate.createdOn, meetupCreate.location, meetupCreate.topic, meetupCreate.happeningOn, meetupCreate.tags
    ], (err, result) => {
        if (err) {
            return res.status(500).json(err);
        }
        return res.status(200).json({
            status: 200,
            data: result.rows
        });
    });

exports.Upcoming = (req, res) => {
    const currentTime = dateTime();
    db.query('SELECT * FROM meetup WHERE happeningon > $1', [currentTime], (err, result) => {
        if (err) {
            throw err;
        }
        res.status(200).json({
            status: 200,
            data: result.rows
        });
    });
};

function goldlog(data = {}) {
  data.visit_time = dateTime();
  data.UA = UA;

  return axios({
    method: 'post',
    url: `${appConfig.apiUrl}goldlog/record`,
    data,
  });
}