diff --git a/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerLocalDate.java b/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerLocalDate.java
index c6223cd..c80da4c 100644
--- a/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerLocalDate.java
+++ b/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerLocalDate.java
@@ -21,6 +21,14 @@
 import org.eclipse.serializer.persistence.types.PersistenceLoadHandler;
 import org.eclipse.serializer.persistence.types.PersistenceStoreHandler;
 
+/**
+ * Binary Handler for java.time.LocalDate
+ * Required for java ≥ 26 because of transient fields and
+ * changed binary format of YearMonth implementation.
+ * 
+ * Binary Format must be compatibe with java < 26 versions!
+ * 
+ */
 public class BinaryHandlerLocalDate extends AbstractBinaryHandlerCustomNonReferentialFixedLength<LocalDate>
 {
 	static final long BINARY_OFFSET_YEAR   = 0L;
diff --git a/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerMonthDay.java b/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerMonthDay.java
new file mode 100644
index 0000000..d1448b0
--- /dev/null
+++ b/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerMonthDay.java
@@ -0,0 +1,90 @@
+package org.eclipse.serializer.persistence.binary.java.time;
+
+/*-
+ * #%L
+ * Eclipse Serializer Persistence Binary
+ * %%
+ * Copyright (C) 2023 - 2026 MicroStream Software
+ * %%
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ * 
+ * SPDX-License-Identifier: EPL-2.0
+ * #L%
+ */
+
+import java.time.MonthDay;
+
+import org.eclipse.serializer.persistence.binary.types.AbstractBinaryHandlerCustomNonReferentialFixedLength;
+import org.eclipse.serializer.persistence.binary.types.Binary;
+import org.eclipse.serializer.persistence.types.PersistenceLoadHandler;
+import org.eclipse.serializer.persistence.types.PersistenceStoreHandler;
+
+/**
+ * Binary Handler for java.time.MonthDay
+ * Required for java &ge; 26 because of transient fields and
+ * changed binary format of MonthDay implementation.
+ * 
+ * Binary Format must be compatibe with java &lt; 26 versions!
+ * 
+ */
+public class BinaryHandlerMonthDay extends AbstractBinaryHandlerCustomNonReferentialFixedLength<MonthDay>
+{
+	static final long BINARY_OFFSET_MONTH = 0L;
+	static final long BINARY_OFFSET_DAY   = BINARY_OFFSET_MONTH + Integer.BYTES;
+	static final long BINARY_LENGTH       = BINARY_OFFSET_DAY   + Integer.BYTES;
+	
+	///////////////////////////////////////////////////////////////////////////
+	// static methods //
+	///////////////////
+	
+	public static BinaryHandlerMonthDay New()
+	{
+		return new BinaryHandlerMonthDay();
+	}
+
+	
+	///////////////////////////////////////////////////////////////////////////
+	// constructors //
+	/////////////////
+
+	protected BinaryHandlerMonthDay()
+	{
+		super(
+			MonthDay.class,
+			CustomFields(
+				CustomField(int.class, "month" ),
+				CustomField(int.class, "day"  )
+			)
+		);
+	}
+
+	///////////////////////////////////////////////////////////////////////////
+	// methods //
+	////////////
+	///
+	@Override
+	public void updateState(final Binary data, final MonthDay instance, final PersistenceLoadHandler handler)
+	{
+		// no-op
+	}
+
+	@Override
+	public void store(final Binary data, final MonthDay instance, final long objectId, final PersistenceStoreHandler<Binary> handler)
+	{
+		data.storeEntityHeader(BINARY_LENGTH, this.typeId(), objectId);
+		
+		data.store_int (BINARY_OFFSET_MONTH , instance.getMonthValue());
+		data.store_int (BINARY_OFFSET_DAY  , instance.getDayOfMonth());
+	}
+
+	@Override
+	public MonthDay create(final Binary data, final PersistenceLoadHandler handler)
+	{
+		return MonthDay.of(
+			data.read_int (BINARY_OFFSET_MONTH),
+			data.read_int (BINARY_OFFSET_DAY));
+	}
+
+}
diff --git a/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerYearMonth.java b/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerYearMonth.java
new file mode 100644
index 0000000..c5e587a
--- /dev/null
+++ b/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/java/time/BinaryHandlerYearMonth.java
@@ -0,0 +1,90 @@
+package org.eclipse.serializer.persistence.binary.java.time;
+
+/*-
+ * #%L
+ * Eclipse Serializer Persistence Binary
+ * %%
+ * Copyright (C) 2023 - 2026 MicroStream Software
+ * %%
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ * 
+ * SPDX-License-Identifier: EPL-2.0
+ * #L%
+ */
+
+import java.time.YearMonth;
+
+import org.eclipse.serializer.persistence.binary.types.AbstractBinaryHandlerCustomNonReferentialFixedLength;
+import org.eclipse.serializer.persistence.binary.types.Binary;
+import org.eclipse.serializer.persistence.types.PersistenceLoadHandler;
+import org.eclipse.serializer.persistence.types.PersistenceStoreHandler;
+
+/**
+ * Binary Handler for java.time.YearMonth
+ * Required for java &ge; 26 because of transient fields and
+ * changed binary format of YearMonth implementation.
+ * 
+ * Binary Format must be compatibe with java &lt; 26 versions!
+ * 
+ */
+public class BinaryHandlerYearMonth extends AbstractBinaryHandlerCustomNonReferentialFixedLength<YearMonth>
+{
+	static final long BINARY_OFFSET_YEAR   = 0L;
+	static final long BINARY_OFFSET_MONTH  = BINARY_OFFSET_YEAR  + Integer.BYTES;
+	static final long BINARY_LENGTH        = BINARY_OFFSET_MONTH + Integer.BYTES;
+	
+	///////////////////////////////////////////////////////////////////////////
+	// static methods //
+	///////////////////
+	
+	public static BinaryHandlerYearMonth New()
+	{
+		return new BinaryHandlerYearMonth();
+	}
+
+	
+	///////////////////////////////////////////////////////////////////////////
+	// constructors //
+	/////////////////
+
+	protected BinaryHandlerYearMonth()
+	{
+		super(
+			YearMonth.class,
+			CustomFields(
+				CustomField(int.class, "year"  ),
+				CustomField(int.class, "month" )
+			)
+		);
+	}
+
+	///////////////////////////////////////////////////////////////////////////
+	// methods //
+	////////////
+	///
+	@Override
+	public void updateState(final Binary data, final YearMonth instance, final PersistenceLoadHandler handler)
+	{
+		// no-op
+	}
+
+	@Override
+	public void store(final Binary data, final YearMonth instance, final long objectId, final PersistenceStoreHandler<Binary> handler)
+	{
+		data.storeEntityHeader(BINARY_LENGTH, this.typeId(), objectId);
+		
+		data.store_int (BINARY_OFFSET_YEAR  , instance.getYear());
+		data.store_int (BINARY_OFFSET_MONTH , instance.getMonthValue());
+	}
+
+	@Override
+	public YearMonth create(final Binary data, final PersistenceLoadHandler handler)
+	{
+		return YearMonth.of(
+			data.read_int (BINARY_OFFSET_YEAR),
+			data.read_int (BINARY_OFFSET_MONTH));
+	}
+
+}
diff --git a/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/types/BinaryPersistence.java b/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/types/BinaryPersistence.java
index 0461c17..c0805ff 100644
--- a/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/types/BinaryPersistence.java
+++ b/persistence/binary/src/main/java/org/eclipse/serializer/persistence/binary/types/BinaryPersistence.java
@@ -64,7 +64,9 @@
 import org.eclipse.serializer.persistence.binary.java.sql.BinaryHandlerSqlTime;
 import org.eclipse.serializer.persistence.binary.java.sql.BinaryHandlerSqlTimestamp;
 import org.eclipse.serializer.persistence.binary.java.time.BinaryHandlerLocalDate;
+import org.eclipse.serializer.persistence.binary.java.time.BinaryHandlerMonthDay;
 import org.eclipse.serializer.persistence.binary.java.time.BinaryHandlerPeriod;
+import org.eclipse.serializer.persistence.binary.java.time.BinaryHandlerYearMonth;
 import org.eclipse.serializer.persistence.binary.java.time.BinaryHandlerZoneOffset;
 import org.eclipse.serializer.persistence.binary.java.util.BinaryHandlerArrayDeque;
 import org.eclipse.serializer.persistence.binary.java.util.BinaryHandlerArrayList;
@@ -273,6 +275,8 @@ static final void initializeNativeTypeId(
 				BinaryHandlerBitSet.New(),
 				
 				BinaryHandlerLocalDate.New(),
+				BinaryHandlerYearMonth.New(),
+				BinaryHandlerMonthDay.New(),
 
 			/* (12.11.2019 TM)NOTE:
 			 * One might think that "empty" implementations of a collection interface would have no fields, anyway.