function partition(key, value, numReducers){
	out.println("Partitioner JS Started!");
	out.println("NumReducers: " + numReducers);

	var doc = JSON.parse(value);
	var date = doc["SOME_DATE_FIELD"].toString();
	var day = parseInt(date.substring(8, 10));
	var reducerNum = 0;

	out.println(date);
	out.println(day);

	if (day < 10) {
		reducerNum = 0;
	}
	else if (day > 10 && day <= 20)
	{
		reducerNum = 1 % numReducers;
	}
	else {
		reducerNum = 2 % numReducers;
	}

	out.println("Partitioner JS Finished!");

	return reducerNum;
}