I am using nodejs with the node-mongodb-native driver (http://mongodb.github.io/node-mongodb-native/).
I have documents with a date property stored as ISODate<
ISODate<
You can go through my answer, provided in other asked question.
Their instead of $eq use $gte:"yyyy-mm-dd", $lte:"yyyy-mm-dd"
NodeJS MongoDB: Querying ISO Date
Hope this will help you or somebody else!