diff --git a/src/graphql/resolvers.ts b/src/graphql/resolvers.ts
index fcae8ad..44ea21d 100644
--- a/src/graphql/resolvers.ts
+++ b/src/graphql/resolvers.ts
@@ -335,10 +335,33 @@ export function resolver(req: any, res: any): any {
                 return new NotLoggedInGqlError();
             }
         },
-        async createEvent({name, dueDate, groupId}: {name: string, dueDate: Date, groupId: number}) {
+        async createEvent({name, dueDate, groupId}: {name: string, dueDate: string, groupId: number}) {
             if (req.session.userId) {
+                const date = new Date(dueDate);
                 const group = await models.Group.findByPk(groupId);
-                const event = await group.$create<models.Event>("rEvents", {name, dueDate});
+                return group.$create<models.Event>("rEvent", {name, dueDate: date});
+            } else {
+                res.status(status.UNAUTHORIZED);
+                return new NotLoggedInGqlError();
+            }
+        },
+        async joinEvent({eventId}: {eventId: number}) {
+            if (req.session.userId) {
+                const event = await models.Event.findByPk(eventId);
+                const self = await models.User.findByPk(req.session.userId);
+                await event.$add("rParticipants", self);
+                return event;
+            } else {
+                res.status(status.UNAUTHORIZED);
+                return new NotLoggedInGqlError();
+            }
+        },
+        async leaveEvent({eventId}: {eventId: number}) {
+            if (req.session.userId) {
+                const event = await models.Event.findByPk(eventId);
+                const self = await models.User.findByPk(req.session.userId);
+                await event.$remove("rParticipants", self);
+                return event;
             } else {
                 res.status(status.UNAUTHORIZED);
                 return new NotLoggedInGqlError();
diff --git a/src/graphql/schema.graphql b/src/graphql/schema.graphql
index 66f0ed5..fc0f156 100644
--- a/src/graphql/schema.graphql
+++ b/src/graphql/schema.graphql
@@ -84,6 +84,15 @@ type Mutation {
 
     "removes an admin from the group"
     removeGroupAdmin(groupId: ID!, userId: ID!): Group
+
+    "Creates a new event with a epoch due date on a group."
+    createEvent(name: String, dueDate: String, groupId: ID!): Event
+
+    "Joins a event."
+    joinEvent(eventId: ID!): Event
+
+    "Leaves a event."
+    leaveEvent(eventId: ID!): Event
 }
 
 interface UserData {
@@ -161,6 +170,9 @@ type Profile implements UserData {
     "name of the User"
     name: String!
 
+    "the email of the user"
+    email: String!
+
     "returns the chatrooms the user joined."
     chats(first: Int=10, offset: Int): [ChatRoom]
 
@@ -301,6 +313,26 @@ type Group {
 
     "the groups chat"
     chat: ChatRoom
+
+    "the events of the group"
+    events: [Event!]!
+}
+
+type Event {
+    "ID of the event"
+    id: ID!
+
+    "Name of the event"
+    name: String!
+
+    "The date of the event."
+    dueDate: String!
+
+    "The group the event belongs to."
+    group: Group!
+
+    "The participants of the event."
+    participants: [User!]!
 }
 
 "represents the type of vote performed on a post"
diff --git a/src/lib/dataaccess.ts b/src/lib/dataaccess.ts
index 3c3862f..e1c5a1f 100644
--- a/src/lib/dataaccess.ts
+++ b/src/lib/dataaccess.ts
@@ -229,6 +229,7 @@ namespace dataaccess {
      * @param members
      */
     export async function createGroup(name: string, creator: number, members: number[]): Promise<models.Group> {
+        members = members || [];
         return sequelize.transaction(async (t) => {
             members.push(creator);
             const groupChat = await createChat(...members);