diff --git a/project/ts/functionality/main.ts b/project/ts/functionality/main.ts
index 1299516..2fcfee8 100644
--- a/project/ts/functionality/main.ts
+++ b/project/ts/functionality/main.ts
@@ -16,6 +16,7 @@ import randomNumber from "./randoms/randomNumber";
 import removeDuplicate from "./arrays/removeDuplicate";
 import reverseString from "./strings/reverseString";
 import reverseNumber from "./numbers/reverseNumber";
+import addCommas from "./numbers/addCommas";
 import shuffle from "./arrays/shuffle";
 import randomString from "./randoms/randomString";
 import randomColor from "./randoms/randomColor";
@@ -36,6 +37,7 @@ import getDays from "./user/getDays";
 import getHours from "./user/getHours";
 import getMinutes from "./user/getMinutes";
 import getSeconds from "./user/getSeconds";
+import getBirthDay from "./user/getBirthDay";
 import select from "./dom/select";
 
 const functionality = {
@@ -54,6 +56,7 @@ const functionality = {
   randomElementFrom,
   randomHex,
   randomNumber,
+  addCommas,
   removeDuplicate,
   reverseString,
   reverseNumber,
@@ -75,6 +78,7 @@ const functionality = {
   getHours,
   getSeconds,
   getMinutes,
+  getBirthDay,
   select,
 };
 
diff --git a/project/ts/functionality/numbers/addCommas.ts b/project/ts/functionality/numbers/addCommas.ts
new file mode 100644
index 0000000..5f3eb8c
--- /dev/null
+++ b/project/ts/functionality/numbers/addCommas.ts
@@ -0,0 +1,9 @@
+/**
+ * Returns Number With Commas To Facilitate Reading | e.g 1000000 => 1,000,000
+ *
+ * @param {number} number
+ * @returns {string}
+ */
+export default function addCommas(number: number): string {
+  return number.toString().replace(/\B(?<!\.\d*)(?=(\d{3})+(?!\d))/g, ",");
+}
diff --git a/project/ts/functionality/user/getBirthDay.ts b/project/ts/functionality/user/getBirthDay.ts
new file mode 100644
index 0000000..71e113a
--- /dev/null
+++ b/project/ts/functionality/user/getBirthDay.ts
@@ -0,0 +1,11 @@
+/**
+ * Returns the Age From a Given Year | e.g 2007 -> 15
+ *
+ * @param {number} year
+ * @returns {number}
+ */
+export default function getBirthDay(year: number): number {
+  var currentDate = new Date();
+  var currentYear = currentDate.getFullYear();
+  return currentYear - year;
+}