how to use date pipe in an object in angular and format it to JSON for node?

Im trying to have the current date as an object property and convert it to Json for node back end. I also don't know if the date property in node will capture the instance from the front end

In angular 2/4 i have

const newCustomer = {
   firstName: this.firstName;
   lastName: this.lastName;
   date: number = Date.now();
}

My router.post in node

router.post('/customers', (req,res,next) =>{

let newCustomer = new Customer({

    firstName: req.body.firstName,
    lastName: req.body.lastName,
    date: Date.now()


});

newCustomer.save(function(err, Customer){

    if (err){

        res.json({msg: 'Failed to add contact'});

    }else{

        res.json({msg: 'Customer added to waitlist'});

    }
});

My model/Schema for customer

const customerSchema = new Schema({

date: new Date();

firstName: {
    type: String,
    //required means there has to be a name
    required: true
},

lastName: {
    type: String,
    required: true
}


});

via TexasState Han