Need feedback for FreeCodeCamp Timestamp Microservice Project

Tell us what’s happening:
I tried to make it without Moment JS and it’s working.

https://kaput-join.glitch.me/api/timestamp/1539129600
https://kaput-join.glitch.me/api/timestamp/2015-10-10

I think, I should add some RegExp and 404 route. But I don’t know RegExp yet.
Are there any bad practices in the code? Thank you!

Your code so far

app.get('/api/timestamp/:date', function(req, res) {
    // check, if entry is yyyy-mm--dd
    var data = req.params.date;
    if (isNaN(data)) {
        // if entry is yy-mm-dd
        var unixFormat = new Date(data).getTime()/1000;
        var temp = new Date(unixFormat * 1000);
        var utc = temp.toUTCString();
    }
    else {
        // if entry is unix time
        var temp = new Date(data * 1000);
        var utc = temp.toUTCString();
        var unixFormat = parseInt(data); // for removing quotation marks 
    }
    res.json({
        unix: unixFormat,
        utc: utc
    });
})

app.get('/api/timestamp', function(req, res) {
    // Now
    var time = new Date();
    var utc = time.toUTCString()
    var unix = time.getTime();
    res.json({
        unix: unix,
        utc: utc
    });
})

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/apis-and-microservices/apis-and-microservices-projects/timestamp-microservice

Thank you! I am waiting for some feedbacks.