diff --git a/wpilibc/src/main/native/include/frc/Timer.h b/wpilibc/src/main/native/include/frc/Timer.h
index ea71a0050a..a1a8bc7758 100644
--- a/wpilibc/src/main/native/include/frc/Timer.h
+++ b/wpilibc/src/main/native/include/frc/Timer.h
@@ -5,6 +5,7 @@
 #pragma once
 
 #include <units/time.h>
+#include <wpi/deprecated.h>
 
 namespace frc {
 
@@ -97,7 +98,9 @@ class Timer {
    *
    * @param period The period to check for.
    * @return       True if the period has passed.
+   * @deprecated Use AdvanceIfElapsed() instead.
    */
+  WPI_DEPRECATED("Use AdvanceIfElapsed() instead.")
   bool HasPeriodPassed(units::second_t period);
 
   /**
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/Timer.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/Timer.java
index b4147795ad..17e1164c38 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/Timer.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/Timer.java
@@ -134,7 +134,9 @@ public class Timer {
    *
    * @param period The period to check for (in seconds).
    * @return Whether the period has passed.
+   * @deprecated Use advanceIfElapsed() instead.
    */
+  @Deprecated(since = "2022", forRemoval = true)
   public boolean hasPeriodPassed(double period) {
     return advanceIfElapsed(period);
   }