diff --git a/src/pages/test firestore/TestFirestore.tsx b/src/pages/test firestore/TestFirestore.tsx
index c569717..ba10d12 100644
--- a/src/pages/test firestore/TestFirestore.tsx	
+++ b/src/pages/test firestore/TestFirestore.tsx	
@@ -3,7 +3,7 @@ import {auth} from "../../utils/firebase.ts";
 import {useState} from "react";
 import {
     deleteTransaction,
-    getTransactions,
+    getTransactionsFilterOrderBy,
     overwriteTransaction,
     Transaction,
     writeNewTransaction
@@ -12,6 +12,7 @@ import {faker, fakerEN_GB} from "@faker-js/faker";
 import {getCurrentBalance} from "../../utils/transaction_utils.ts";
 import {signInWithGoogle} from "../../utils/authentication.ts";
 import {Header} from "../../components/Header.tsx";
+import { orderBy } from "firebase/firestore";
 
 function writeSampleData() {
     if (auth.currentUser === null) {
@@ -25,7 +26,7 @@ function writeSampleData() {
         parseFloat(faker.finance.amount({min: -1000, max: 1000})),
         faker.word.noun(),
         faker.finance.currency().code,
-        faker.date.past().toISOString(),
+        faker.date.past().valueOf(),
         faker.lorem.sentence(),
         faker.internet.emoji(),
         faker.word.noun(),
@@ -68,7 +69,7 @@ export  function TestFirestorePage() {
         </>;
     }
 
-    getTransactions(auth.currentUser).then((t) => setTransactions(t));
+    getTransactionsFilterOrderBy(auth.currentUser, orderBy("dateTime", "desc")).then((t) => setTransactions(t));
     getCurrentBalance(auth.currentUser).then((b) => setBalance(b));
 
     return (
@@ -92,12 +93,13 @@ export  function TestFirestorePage() {
                 Transactions: <br/>
             </p>
             {
-                transactions.map((t) => <div key={t.forceGetDocName()}>
+                transactions.map((t) => <div className="mb-4" key={t.forceGetDocName()}>
+                    <p className="m-0">{new Date(t.dateTime).toISOString()}</p>
                     <textarea readOnly={true} style={{width: "100%", height: "320px"}} value={JSON.stringify(t, null, 4)}/>
                     <button onClick={() => {deleteTransaction(t.forceGetDocName()).then(() => setUpdate(update + 1))}}>Delete</button>
                     <button onClick={() => {
                         if (auth.currentUser != null) {
-                            t.dateTime = new Date(Date.now()).toISOString();
+                            t.dateTime = new Date(Date.now()).valueOf();
                             overwriteTransaction(auth.currentUser, t.forceGetDocName(), t).then(() => setUpdate(update + 1));
                         }
                     }}>Set Time To Now</button>
diff --git a/src/utils/firestore.ts b/src/utils/firestore.ts
index 3af4479..5692c80 100644
--- a/src/utils/firestore.ts
+++ b/src/utils/firestore.ts
@@ -1,5 +1,6 @@
 import {collection,
-    deleteDoc, doc, DocumentSnapshot, getDocs, limit, query, QueryFieldFilterConstraint, setDoc, SnapshotOptions,
+    deleteDoc, doc, DocumentSnapshot, getDocs, limit, query,
+    QueryConstraint, setDoc, SnapshotOptions,
     startAfter, where, writeBatch} from "firebase/firestore";
 import {User} from "firebase/auth";
 import {db} from "./firebase.ts";
@@ -11,14 +12,14 @@ export class Transaction {
     public amount: number;
     public category: string;
     public currency: string;
-    public dateTime: string;
+    public dateTime: number;
     public description: string;
     public emoji: string;
     public name: string;
     public notes: string;
     public readonly uid: string;
 
-    constructor (address: string, amount: number, category: string, currency: string, dateTime: string, description: string, emoji: string, name: string, notes: string, uid: string) {
+    constructor (address: string, amount: number, category: string, currency: string, dateTime: number, description: string, emoji: string, name: string, notes: string, uid: string) {
         this.address = address;
         this.amount = amount;
         this.category = category;
@@ -123,7 +124,7 @@ export async function getTransactionsByDocName(user: User, docName: string): Pro
 }
 
 // Returns all transactions for the given `user` with the `filters` applied
-export async function getTransactionsFilterOrderBy(user: User, ...filters: QueryFieldFilterConstraint[]): Promise<Transaction[]> {
+export async function getTransactionsFilterOrderBy(user: User, ...filters:  QueryConstraint[]): Promise<Transaction[]> {
     const q = query(collection(db, "Transactions"), where("uid", "==", user.uid), ...filters);
     const ts: Transaction[] = [];
     await getDocs(q).then((qs) =>
diff --git a/src/utils/transaction_utils.ts b/src/utils/transaction_utils.ts
index bbd6908..b0584df 100644
--- a/src/utils/transaction_utils.ts
+++ b/src/utils/transaction_utils.ts
@@ -1,9 +1,28 @@
-import { User } from "firebase/auth";
-import {getTransactions} from "./firestore.ts";
+import {User} from "firebase/auth";
+import {getTransactions, getTransactionsFilterOrderBy, Transaction} from "./firestore.ts";
+import {where} from "firebase/firestore";
 
 export async function getCurrentBalance(user: User): Promise<number> {
     const transactions = await getTransactions(user);
     let balance = 0;
     transactions.forEach(transaction => {balance += transaction.amount;});
     return Math.round(balance * 100) / 100;
+}
+
+const MONTH_MILLIS = 2.628e+9;
+
+export async function getLastMonthTransaction(user: User): Promise<Transaction[]> {
+    return await getTransactionsFilterOrderBy(user, where("dateTime", ">", Date.now() - MONTH_MILLIS));
+}
+
+const WEEK_MILLIS = 6.048e+8;
+
+export async function getLastWeekTransaction(user: User): Promise<Transaction[]> {
+    return await getTransactionsFilterOrderBy(user, where("dateTime", ">", Date.now() - WEEK_MILLIS));
+}
+
+const DAY_MILLIS = 8.64e+7;
+
+export async function getLastDayTransaction(user: User): Promise<Transaction[]> {
+    return await getTransactionsFilterOrderBy(user, where("dateTime", ">", Date.now() - DAY_MILLIS));
 }
\ No newline at end of file