diff --git a/store/api/marathon.ts b/store/api/marathon.ts
index 375cdaf2..3e9f5150 100644
--- a/store/api/marathon.ts
+++ b/store/api/marathon.ts
@@ -1,12 +1,13 @@
 import Vue from 'vue';
 import { ActionTree, MutationTree } from 'vuex';
 import { OengusAPI } from '~/plugins/oengus';
-import { FrontPageMarathons, FullMarathon, MarathonState } from '~/types/api/marathon';
+import { FrontPageMarathons, FullMarathon, Marathon, MarathonState } from '~/types/api/marathon';
 
 const MarathonOengusAPI = new OengusAPI<MarathonState>('marathons');
 
 export const state = (): MarathonState => ({
   marathons: { },
+  calendars: { },
   frontPage: undefined,
 });
 
@@ -17,9 +18,13 @@ export const mutations: MutationTree<MarathonState> = {
   addFrontPage(state, { value: frontPage }): void {
     Vue.set(state, 'frontPage', frontPage);
   },
+  addSchedule(state, { value: schedule, data }): void {
+    Vue.set(state.calendars, `${data.start}-${data.end}`, schedule);
+  },
 };
 
 export const actions: ActionTree<MarathonState, MarathonState> = {
   get: MarathonOengusAPI.get<FullMarathon>({ key: 'marathons', mutation: 'addMarathon' }),
   frontPage: MarathonOengusAPI.get<FrontPageMarathons>({ key: 'frontPage' }),
+  calendar: MarathonOengusAPI.get<Array<Marathon>>({ path: 'forDates', key: 'calendars' }),
 };
diff --git a/types/api/marathon.d.ts b/types/api/marathon.d.ts
index 1462f8aa..d562a7eb 100644
--- a/types/api/marathon.d.ts
+++ b/types/api/marathon.d.ts
@@ -68,9 +68,19 @@ export interface FrontPageMarathons {
 
 export interface MarathonState extends OengusState {
   marathons: { [id: string]: FullMarathon };
+  calendars: { [date: string]: Array<Marathon> };
   frontPage?: FrontPageMarathons;
 }
 
+export interface MarathonForDateParams {
+  /** ISO Date string */
+  start: string;
+  /** ISO Date string */
+  end: string;
+  /** IANA Time Zone name */
+  zoneId: string;
+}
+
 export type QuestionType = 'TEXT'|'SELECT'|'TEXTAREA'|'CHECKBOX'|'FREETEXT';
 
 export interface Question {