Query firebase data by timestamp month

Question

So i have my records in firebase cloud firestore like this :

[  
   {  
      "category":"drinks",
      "expensetype":"card",
      "id":"5c673c4d-0a7f-9bb4-75e6-e71c47aa8d1d",
      "name":"JJ",
      "note":"YY",
      "price":57,
      "timestamp":"2017-11-30T22:44:43+05:30"
   },
   {  
      "category":"drinks",
      "expensetype":"card",
      "id":"85731878-eaed-2740-6802-e35e7758270b",
      "name":"VV",
      "note":"TTT",
      "price":40,
      "timestamp":"2017-12-30T22:41:13+05:30"
   }
]

I want to query data with the timestamp and get data that belongs to a particular month or date.

For example if I click a particular month (say March) in my calendar, I want only the data of that particular month in my results. How can i do that?

I have saved the date using firebase.firestore.FieldValue.serverTimestamp()

Thanks in advance for any help.

Edit :

This is how I form my query

var spendsRef = this.db.collection('spend', ref => ref.where("timestamp", ">", "12-12-2017"));

this.items = spendsRef.valueChanges();

But it still returns me all the data in Database

Answer :

var todayDate = new Date("Tue Jan 02 2018 00:00:00 GMT+0530 (IST)") // Any date in string
var spendsRef = this.db.collection('spend', ref => ref.where("timestamp", ">", todayDate));
this.items = spendsRef.valueChanges();

Answer 1

Using two relative operators, you can determine the precise range of documents returned by the query:

ref.where("timestamp", ">=", "2017-11").where("timestamp", "<", "2017-12")