diff --git a/hooks/firebase/types/todoData.ts b/hooks/firebase/types/todoData.ts
index 9a852b2..32542c0 100644
--- a/hooks/firebase/types/todoData.ts
+++ b/hooks/firebase/types/todoData.ts
@@ -23,3 +23,10 @@ export const DAYS_OF_WEEK_ENUM = {
   SATURDAY: "Saturday",
   SUNDAY: "Sunday"
 }
+
+export const REPEAT_TYPE = {
+  NONE: "None",
+  EVERY_WEEK: "Every week",
+  ONCE_A_MONTH: "Once a month",
+  ONCE_A_YEAR: "Once a year"
+}
\ No newline at end of file
diff --git a/hooks/firebase/useCreateTodo.ts b/hooks/firebase/useCreateTodo.ts
index d065fc5..fefffcf 100644
--- a/hooks/firebase/useCreateTodo.ts
+++ b/hooks/firebase/useCreateTodo.ts
@@ -1,7 +1,17 @@
-import { useMutation, useQueryClient } from "react-query";
+import {useMutation, useQueryClient} from "react-query";
 import firestore from "@react-native-firebase/firestore";
-import { useAuthContext } from "@/contexts/AuthContext";
-import { IToDo } from "@/hooks/firebase/types/todoData";
+import {useAuthContext} from "@/contexts/AuthContext";
+import {DAYS_OF_WEEK_ENUM, IToDo, REPEAT_TYPE} from "@/hooks/firebase/types/todoData";
+import {addDays, addMonths, addWeeks, compareAsc, format, getDay, subDays} from "date-fns";
+
+const daysOfWeek = [
+    DAYS_OF_WEEK_ENUM.MONDAY,
+    DAYS_OF_WEEK_ENUM.TUESDAY,
+    DAYS_OF_WEEK_ENUM.WEDNESDAY,
+    DAYS_OF_WEEK_ENUM.THURSDAY,
+    DAYS_OF_WEEK_ENUM.FRIDAY,
+    DAYS_OF_WEEK_ENUM.SATURDAY,
+    DAYS_OF_WEEK_ENUM.SUNDAY];
 
 export const useCreateTodo = () => {
     const { user: currentUser, profileData } = useAuthContext();
@@ -11,10 +21,78 @@ export const useCreateTodo = () => {
         mutationKey: ["createTodo"],
         mutationFn: async (todoData: Partial<IToDo>) => {
             try {
+                // Create the one original to do
                 const newDoc = firestore().collection('Todos').doc();
+                let originalTodo = {...todoData, id: newDoc.id, familyId: profileData?.familyId, creatorId: currentUser?.uid}
                 await firestore()
                     .collection("Todos")
-                    .add({...todoData, id: newDoc.id, familyId: profileData?.familyId, creatorId: currentUser?.uid})
+                    .add(originalTodo);
+
+                if (todoData.repeatType !== REPEAT_TYPE.NONE) {
+                    const batch = firestore().batch();
+
+                    if (todoData.repeatType === REPEAT_TYPE.EVERY_WEEK) {
+
+                        let date = originalTodo.date;
+                        let repeatDays = originalTodo.repeatDays;
+                        const dates = [];
+
+                        const originalDateDay = format(date, 'EEEE');
+                        const originalNumber = daysOfWeek.indexOf(originalDateDay);
+                        repeatDays?.forEach((day) => {
+                            let number = daysOfWeek.indexOf(day);
+                            let newDate;
+                            if (originalNumber > number) {
+                                let diff = originalNumber - number;
+                                newDate = subDays(date, diff);
+                            } else {
+                                let diff = number - originalNumber;
+                                newDate = addDays(date, diff);
+                            }
+                            dates.push(newDate);
+                        });
+
+                        // TODO: for the next 52 weeks
+                        for (let i = 0; i < 4; i++) {
+                           dates?.forEach((dateToAdd) => {
+                               let newTodoDate = addWeeks(dateToAdd, i);
+                               if (compareAsc(newTodoDate, originalTodo.date) !== 0) {
+                                   const newTodo = { ...originalTodo, date: newTodoDate, connectedTodoId: newDoc.id };
+
+                                   let docRef = firestore().collection("Todos").doc();
+                                   batch.set(docRef, newTodo);
+                                   console.log(newTodo);
+                               }
+                           })
+                        }
+                    } else if (todoData.repeatType === REPEAT_TYPE.ONCE_A_MONTH) {
+
+                        // for the next 12 months
+                        for (let i = 0; i < 12; i++) {
+                            let date = originalTodo.date;
+                            const nextMonth = addMonths(date, i + 1);
+                            const newTodo = { ...originalTodo, date: nextMonth, connectedTodoId: newDoc.id };
+                            console.log(newTodo);
+
+                            let docRef = firestore().collection("Todos").doc();
+                            batch.set(docRef, newTodo);
+                        }
+                    } else if (todoData.repeatType === REPEAT_TYPE.ONCE_A_YEAR) {
+
+                        // for the next 5 years
+                        for (let i = 0; i < 5; i++) {
+                            let date = originalTodo.date;
+                            const nextMonth = addMonths(date, i + 1);
+                            const newTodo = { ...originalTodo, date: nextMonth, connectedTodoId: newDoc.id };
+                            console.log(newTodo);
+
+                            let docRef = firestore().collection("Todos").doc();
+                            batch.set(docRef, newTodo);
+                        }
+                    }
+
+                    await batch.commit();
+                }
             } catch (e) {
                 console.error(e)
             }