My application will allow user to create coupons. 

Coupon will be valid in `datefrom` and `dateto` period. 

The thing is that every coupon should be valid for selected days, not hours. 

For example since Monday(2016-06-12) to Tuesday(2016-06-13), so two days. 

How should I store dates on server side and then compare it using `$gte` clause in Mongoose? 

Thank you :-)