diff --git a/api/current.txt b/api/current.txt
index 26bd92508ab76..3cbb4ba7d51d2 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -30331,7 +30331,7 @@ package android.text.format {
     method public static java.lang.String formatShortFileSize(android.content.Context, long);
   }
 
-  public class Time {
+  public deprecated class Time {
     ctor public Time(java.lang.String);
     ctor public Time();
     ctor public Time(android.text.format.Time);
@@ -31702,7 +31702,7 @@ package android.util {
     field public final int mTag;
   }
 
-  public class FloatMath {
+  public deprecated class FloatMath {
     method public static float ceil(float);
     method public static float cos(float);
     method public static float exp(float);
diff --git a/core/java/android/text/format/Time.java b/core/java/android/text/format/Time.java
index aa6ad20487190..1e04eb45471d8 100644
--- a/core/java/android/text/format/Time.java
+++ b/core/java/android/text/format/Time.java
@@ -48,7 +48,10 @@ import libcore.util.ZoneInfoDB;
  *     <li>Much of the formatting / parsing assumes ASCII text and is therefore not suitable for
  *     use with non-ASCII scripts.</li>
  * </ul>
+ *
+ * @deprecated Use {@link java.util.GregorianCalendar} instead.
  */
+@Deprecated
 public class Time {
     private static final String Y_M_D_T_H_M_S_000 = "%Y-%m-%dT%H:%M:%S.000";
     private static final String Y_M_D_T_H_M_S_000_Z = "%Y-%m-%dT%H:%M:%S.000Z";
diff --git a/core/java/android/util/FloatMath.java b/core/java/android/util/FloatMath.java
index 0ffd5bd610982..bdcf5ca2bc9e0 100644
--- a/core/java/android/util/FloatMath.java
+++ b/core/java/android/util/FloatMath.java
@@ -21,7 +21,10 @@ package android.util;
  * versions of Android with a JIT, these are significantly slower than
  * the equivalent {@code Math} functions, which should be used in preference
  * to these.
+ *
+ * @deprecated Use {@link java.lang.Math} instead.
  */
+@Deprecated
 public class FloatMath {
 
     /** Prevents instantiation. */