diff --git a/CalrendarView/.gitignore b/CalrendarView/.gitignore
new file mode 100644
index 0000000..42afabf
--- /dev/null
+++ b/CalrendarView/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/CalrendarView/build.gradle.kts b/CalrendarView/build.gradle.kts
new file mode 100644
index 0000000..65a9acd
--- /dev/null
+++ b/CalrendarView/build.gradle.kts
@@ -0,0 +1,43 @@
+plugins {
+    alias(libs.plugins.androidLibrary)
+    alias(libs.plugins.jetbrainsKotlinAndroid)
+}
+
+android {
+    namespace = "com.example.calrendarview"
+    compileSdk = 34
+
+    defaultConfig {
+        minSdk = 24
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        consumerProguardFiles("consumer-rules.pro")
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.appcompat)
+    implementation(libs.material)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+}
\ No newline at end of file
diff --git a/CalrendarView/consumer-rules.pro b/CalrendarView/consumer-rules.pro
new file mode 100644
index 0000000..e69de29
diff --git a/CalrendarView/proguard-rules.pro b/CalrendarView/proguard-rules.pro
new file mode 100644
index 0000000..481bb43
--- /dev/null
+++ b/CalrendarView/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/CalrendarView/src/androidTest/java/com/example/calrendarview/ExampleInstrumentedTest.kt b/CalrendarView/src/androidTest/java/com/example/calrendarview/ExampleInstrumentedTest.kt
new file mode 100644
index 0000000..08e8374
--- /dev/null
+++ b/CalrendarView/src/androidTest/java/com/example/calrendarview/ExampleInstrumentedTest.kt
@@ -0,0 +1,24 @@
+package com.example.calrendarview
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.example.calrendarview.test", appContext.packageName)
+    }
+}
\ No newline at end of file
diff --git a/CalrendarView/src/main/AndroidManifest.xml b/CalrendarView/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..a5918e6
--- /dev/null
+++ b/CalrendarView/src/main/AndroidManifest.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+</manifest>
\ No newline at end of file
diff --git a/CalrendarView/src/main/java/com/example/calrendarview/BaseCustomViews.kt b/CalrendarView/src/main/java/com/example/calrendarview/BaseCustomViews.kt
new file mode 100644
index 0000000..2d9269e
--- /dev/null
+++ b/CalrendarView/src/main/java/com/example/calrendarview/BaseCustomViews.kt
@@ -0,0 +1,27 @@
+package com.example.calrendarview
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+
+class BaseCustomViews : View {
+    constructor(context: Context?) : super(context){appyAttrs(null)}
+    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs){appyAttrs(attrs)}
+    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(
+        context,
+        attrs,
+        defStyleAttr
+    ){appyAttrs(attrs)}
+
+    constructor(
+        context: Context?,
+        attrs: AttributeSet?,
+        defStyleAttr: Int,
+        defStyleRes: Int
+    ) : super(context, attrs, defStyleAttr, defStyleRes) {appyAttrs(attrs)}
+
+
+    fun appyAttrs(attrs: AttributeSet?) {
+
+    }
+}
\ No newline at end of file
diff --git a/CalrendarView/src/main/java/com/example/calrendarview/DayView.kt b/CalrendarView/src/main/java/com/example/calrendarview/DayView.kt
new file mode 100644
index 0000000..843505d
--- /dev/null
+++ b/CalrendarView/src/main/java/com/example/calrendarview/DayView.kt
@@ -0,0 +1,40 @@
+package com.example.calrendarview
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+
+class DayView : View {
+    constructor(context: Context?) : super(context){appyAttrs(null)}
+    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs){appyAttrs(attrs)}
+    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(
+        context,
+        attrs,
+        defStyleAttr
+    ){appyAttrs(attrs)}
+
+    constructor(
+        context: Context?,
+        attrs: AttributeSet?,
+        defStyleAttr: Int,
+        defStyleRes: Int
+    ) : super(context, attrs, defStyleAttr, defStyleRes) {appyAttrs(attrs)}
+
+
+    fun appyAttrs(attrs: AttributeSet?) {
+
+    }
+
+    fun displayDayNumber() {
+        //todo 오늘 의 날짜를 표시
+    }
+
+    fun displayDayOfWeek() {
+        //todo 오늘의 요일을 표시?
+    }
+
+    fun isToday() : Boolean {
+        return false
+    }
+
+}
diff --git a/CalrendarView/src/main/java/com/example/calrendarview/MonthView.kt b/CalrendarView/src/main/java/com/example/calrendarview/MonthView.kt
new file mode 100644
index 0000000..b27b75f
--- /dev/null
+++ b/CalrendarView/src/main/java/com/example/calrendarview/MonthView.kt
@@ -0,0 +1,56 @@
+package com.example.calrendarview
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+import com.example.calrendarview.model.DayInfo
+
+
+class MonthView : View {
+    constructor(context: Context?) : super(context){appyAttrs(null)}
+    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs){appyAttrs(attrs)}
+    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(
+        context,
+        attrs,
+        defStyleAttr
+    ){appyAttrs(attrs)}
+
+    constructor(
+        context: Context?,
+        attrs: AttributeSet?,
+        defStyleAttr: Int,
+        defStyleRes: Int
+    ) : super(context, attrs, defStyleAttr, defStyleRes) {appyAttrs(attrs)}
+
+
+    fun appyAttrs(attrs: AttributeSet?) {
+
+    }
+
+    var numberOfRow : Int = 7
+        set(value) {
+            field = value
+            initChildViews()
+        }
+
+    fun initChildViews() {
+        //todo : 7 * numberOfRow 의 차일드 뷰를 만든다.
+    }
+
+    fun displyMonthOfNumber() {
+        //todo :월 표시
+    }
+
+    fun displayWeekHeader() {
+        //todo 주간 요일 표시
+    }
+
+    fun displayYear(){
+        //todo 년도 표시
+    }
+
+    fun setData(days : Collection<DayInfo>) {
+        //todo 최대 7*6의 데이터를 받는다.
+    }
+}
+
diff --git a/CalrendarView/src/main/java/com/example/calrendarview/model/DayInfo.kt b/CalrendarView/src/main/java/com/example/calrendarview/model/DayInfo.kt
new file mode 100644
index 0000000..e90d09f
--- /dev/null
+++ b/CalrendarView/src/main/java/com/example/calrendarview/model/DayInfo.kt
@@ -0,0 +1,8 @@
+package com.example.calrendarview.model
+
+
+interface DayInfo {
+    fun getDayOfNum()
+    fun getDayOfWeek()
+    fun isToday()
+}
\ No newline at end of file
diff --git a/CalrendarView/src/test/java/com/example/calrendarview/ExampleUnitTest.kt b/CalrendarView/src/test/java/com/example/calrendarview/ExampleUnitTest.kt
new file mode 100644
index 0000000..8335c3f
--- /dev/null
+++ b/CalrendarView/src/test/java/com/example/calrendarview/ExampleUnitTest.kt
@@ -0,0 +1,17 @@
+package com.example.calrendarview
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}
\ No newline at end of file
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index a406e56..eb6459c 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -46,6 +46,8 @@ dependencies {
     implementation(libs.androidx.constraintlayout)
     implementation(libs.androidx.navigation.fragment.ktx)
     implementation(libs.androidx.navigation.ui.ktx)
+    implementation(project(":CalrendarView"))
+
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
diff --git a/build.gradle.kts b/build.gradle.kts
index e60ce26..9fb2867 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -2,6 +2,7 @@
 plugins {
     alias(libs.plugins.androidApplication) apply false
     alias(libs.plugins.jetbrainsKotlinAndroid) apply false
+    alias(libs.plugins.androidLibrary) apply false
 }
 
 buildscript {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index cb66a0c..b68869a 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -25,4 +25,5 @@ androidx-navigation-ui-ktx = { group = "androidx.navigation", name = "navigation
 [plugins]
 androidApplication = { id = "com.android.application", version.ref = "agp" }
 jetbrainsKotlinAndroid = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+androidLibrary = { id = "com.android.library", version.ref = "agp" }
 
diff --git a/settings.gradle.kts b/settings.gradle.kts
index ae006db..08f4b03 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -21,4 +21,4 @@ dependencyResolutionManagement {
 
 rootProject.name = "AccountBook"
 include(":app")
- 
\ No newline at end of file
+include(":CalrendarView")