diff --git a/gradle.properties b/gradle.properties
index 798df0e..305ce56 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -5,7 +5,7 @@ MORNY_ARCHIVE_NAME = morny-coeur
 MORNY_CODE_STORE = https://github.com/Eyre-S/Coeur-Morny-Cono
 MORNY_COMMIT_PATH = https://github.com/Eyre-S/Coeur-Morny-Cono/commit/%s
 
-VERSION = 1.0.0-RC1.1
+VERSION = 1.0.0-RC2
 
 USE_DELTA = false
 VERSION_DELTA =
diff --git a/src/main/java/cc/sukazyo/cono/morny/daemon/MedicationTimer.java b/src/main/java/cc/sukazyo/cono/morny/daemon/MedicationTimer.java
index 5faba4a..0c95a39 100644
--- a/src/main/java/cc/sukazyo/cono/morny/daemon/MedicationTimer.java
+++ b/src/main/java/cc/sukazyo/cono/morny/daemon/MedicationTimer.java
@@ -9,14 +9,19 @@ import com.pengrad.telegrambot.request.EditMessageText;
 import com.pengrad.telegrambot.request.SendMessage;
 import com.pengrad.telegrambot.response.SendResponse;
 
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 import static cc.sukazyo.cono.morny.Log.exceptionLog;
 import static cc.sukazyo.cono.morny.Log.logger;
 
 public class MedicationTimer extends Thread {
 	
+	public static final ZoneOffset USE_TIME_ZONE = ZoneOffset.ofHours(8);
+	public static final Set<Integer> NOTIFY_AT_HOUR = Set.of(12);
 	public static final long NOTIFY_CHAT = -1001729016815L;
 	public static final String NOTIFY_MESSAGE = "\uD83C\uDF65⏲";
 	private static final String DAEMON_THREAD_NAME = "TIMER_Medication";
@@ -69,12 +74,19 @@ public class MedicationTimer extends Thread {
 		lastNotify = LAST_NOTIFY_ID_NULL;
 	}
 	
-	private static long calcNextRoutineTimestamp () {
-		return ((System.currentTimeMillis()+8*60*60*1000) / (12*60*60*1000) + 1) * 12*60*60*1000 - 8*60*60*1000;
+	public static long calcNextRoutineTimestamp (long baseTimeMillis, ZoneOffset useTimeZone, Set<Integer> atHours) {
+		LocalDateTime time = LocalDateTime.ofEpochSecond(
+				baseTimeMillis/1000, (int)baseTimeMillis%1000*1000*1000,
+				useTimeZone
+		).withMinute(0).withSecond(0).withNano(0);
+		do {
+			time = time.plusHours(1);
+		} while (!atHours.contains(time.getHour()));
+		return time.withMinute(0).withSecond(0).withNano(0).toInstant(useTimeZone).toEpochMilli();
 	}
 	
 	private void waitToNextRoutine () throws InterruptedException {
-		sleep(calcNextRoutineTimestamp() - System.currentTimeMillis());
+		sleep(calcNextRoutineTimestamp(System.currentTimeMillis(), USE_TIME_ZONE, NOTIFY_AT_HOUR) - System.currentTimeMillis());
 	}
 	
 }
diff --git a/src/test/java/cc/sukazyo/cono/morny/daemon/TestMedicationTimer.java b/src/test/java/cc/sukazyo/cono/morny/daemon/TestMedicationTimer.java
new file mode 100644
index 0000000..cb74065
--- /dev/null
+++ b/src/test/java/cc/sukazyo/cono/morny/daemon/TestMedicationTimer.java
@@ -0,0 +1,29 @@
+package cc.sukazyo.cono.morny.daemon;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+import java.time.ZoneOffset;
+import java.time.ZonedDateTime;
+import java.util.Set;
+
+public class TestMedicationTimer {
+	
+	@ParameterizedTest
+	@CsvSource(textBlock = """
+			2022-11-13T13:14:35+08, +08, 2022-11-14T12:00:00+08
+			2022-11-13T13:14:35+02, +02, 2022-11-14T12:00:00+02
+			2022-11-13T08:14:35+08, +08, 2022-11-13T12:00:00+08
+			2022-11-13T00:14:35+08, +08, 2022-11-13T12:00:00+08
+			2022-11-13T12:00:00+00, +00, 2022-11-14T12:00:00+00
+			""")
+	void testCalcNextRoutineTimestamp (ZonedDateTime base, ZoneOffset zoneHour, ZonedDateTime expected) {
+		final Set<Integer> at = Set.of(12);
+		Assertions.assertEquals(
+				expected.toEpochSecond()*1000,
+				MedicationTimer.calcNextRoutineTimestamp(base.toEpochSecond()*1000, zoneHour, at)
+		);
+	}
+	
+}