diff --git a/app/src/main/java/com/philliphsu/clock2/util/ParcelableUtil.java b/app/src/main/java/com/philliphsu/clock2/util/ParcelableUtil.java
new file mode 100644
index 0000000..b18ee10
--- /dev/null
+++ b/app/src/main/java/com/philliphsu/clock2/util/ParcelableUtil.java
@@ -0,0 +1,31 @@
+package com.philliphsu.clock2.util;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * Utilities to marshall and unmarshall a {@code Parcelable} to and from a byte array.
+ */
+public final class ParcelableUtil {
+    public static byte[] marshall(Parcelable parcelable) {
+        Parcel parcel = Parcel.obtain();
+        parcelable.writeToParcel(parcel, 0);
+        byte[] bytes = parcel.marshall();
+        parcel.recycle();
+        return bytes;
+    }
+
+    public static Parcel unmarshall(byte[] bytes) {
+        Parcel parcel = Parcel.obtain();
+        parcel.unmarshall(bytes, 0, bytes.length);
+        parcel.setDataPosition(0); // This is extremely important!
+        return parcel;
+    }
+
+    public static <T> T unmarshall(byte[] bytes, Parcelable.Creator<T> creator) {
+        Parcel parcel = unmarshall(bytes);
+        T result = creator.createFromParcel(parcel);
+        parcel.recycle();
+        return result;
+    }
+}