diff --git a/contexts/CalenderContext.tsx b/contexts/CalenderContext.tsx
index 7e38c43..eccfd82 100644
--- a/contexts/CalenderContext.tsx
+++ b/contexts/CalenderContext.tsx
@@ -11,80 +11,6 @@ import {
   isBefore,
   compareAsc
 } from "date-fns";
-// TODO: import types
-
-type Days =
-  | "Sunday"
-  | "Monday"
-  | "Tuesday"
-  | "Wednesday"
-  | "Thursday"
-  | "Friday"
-  | "Saturday";
-
-type DaysOfWeek = Days[];
-
-interface WeekDays {
-  sunday: DaysOfWeek;
-  monday: DaysOfWeek;
-}
-
-interface Sticker {
-  date: Date;
-  sticker: -2 | -1 | 0 | 1 | 2 | null;
-}
-
-interface MonthSticker {
-  date: Date;
-  month: Sticker[];
-}
-
-interface MonthDay extends Sticker {
-  isOverflow: boolean;
-  overflowDirection: "prev" | "next" | null;
-}
-
-interface Month {
-  week1: MonthDay[];
-  week2: MonthDay[];
-  week3: MonthDay[];
-  week4: MonthDay[];
-  week5: MonthDay[];
-  week6: MonthDay[];
-}
-
-interface MonthInfo {
-  date: Date;
-  title: string;
-}
-
-interface MonthLayout {
-  sunday: {
-    weekdays: DaysOfWeek;
-    month: Month;
-  };
-  monday: {
-    weekdays: DaysOfWeek;
-    month: Month;
-  };
-}
-
-interface MonthContext extends MonthInfo {
-  layout: MonthLayout;
-}
-
-interface UpdateCalendarProps {
-  year: number;
-  month: number;
-  day: number;
-}
-
-interface CalenderContextState {
-  selectedDate: Date;
-  title: string;
-  layout: MonthLayout;
-  updateDate: (input: UpdateCalendarProps) => void;
-}
 
 const CalenderContext = createContext({} as CalenderContextState);
 
diff --git a/data/stickerSeeder.ts b/data/stickerSeeder.ts
index 7dbbb0d..2fa46b4 100644
--- a/data/stickerSeeder.ts
+++ b/data/stickerSeeder.ts
@@ -6,11 +6,6 @@ import { getDaysInMonth, getYear, getMonth, isBefore } from "date-fns";
  * the day before the current date, leaving the rest of the month empty.
  */
 
-interface Sticker {
-  date: Date;
-  sticker: -2 | -1 | 0 | 1 | 2 | null;
-}
-
 const generateSticker = (): -2 | -1 | 0 | 1 | 2 => {
   const stickerPossibility = [-2, -1, 0, 1, 2];
   const sticker = Math.floor(Math.random() * stickerPossibility.length);
diff --git a/types/CalenderContext.d.ts b/types/CalenderContext.d.ts
new file mode 100644
index 0000000..2943bd5
--- /dev/null
+++ b/types/CalenderContext.d.ts
@@ -0,0 +1,72 @@
+type Days =
+  | "Sunday"
+  | "Monday"
+  | "Tuesday"
+  | "Wednesday"
+  | "Thursday"
+  | "Friday"
+  | "Saturday";
+
+type DaysOfWeek = Days[];
+
+interface WeekDays {
+  sunday: DaysOfWeek;
+  monday: DaysOfWeek;
+}
+
+interface Sticker {
+  date: Date;
+  sticker: -2 | -1 | 0 | 1 | 2 | null;
+}
+
+interface MonthSticker {
+  date: Date;
+  month: Sticker[];
+}
+
+interface MonthDay extends Sticker {
+  isOverflow: boolean;
+  overflowDirection: "prev" | "next" | null;
+}
+
+interface Month {
+  week1: MonthDay[];
+  week2: MonthDay[];
+  week3: MonthDay[];
+  week4: MonthDay[];
+  week5: MonthDay[];
+  week6: MonthDay[];
+}
+
+interface MonthInfo {
+  date: Date;
+  title: string;
+}
+
+interface MonthLayout {
+  sunday: {
+    weekdays: DaysOfWeek;
+    month: Month;
+  };
+  monday: {
+    weekdays: DaysOfWeek;
+    month: Month;
+  };
+}
+
+interface MonthContext extends MonthInfo {
+  layout: MonthLayout;
+}
+
+interface UpdateCalendarProps {
+  year: number;
+  month: number;
+  day: number;
+}
+
+interface CalenderContextState {
+  selectedDate: Date;
+  title: string;
+  layout: MonthLayout;
+  updateDate: (input: UpdateCalendarProps) => void;
+}
\ No newline at end of file