diff --git a/React/CxxBridge/RCTJSIExecutorRuntimeInstaller.mm b/React/CxxBridge/RCTJSIExecutorRuntimeInstaller.mm
index ae811e14cb0..26b4e21ed72 100644
--- a/React/CxxBridge/RCTJSIExecutorRuntimeInstaller.mm
+++ b/React/CxxBridge/RCTJSIExecutorRuntimeInstaller.mm
@@ -8,6 +8,7 @@
 #include "RCTJSIExecutorRuntimeInstaller.h"
 
 #import <React/RCTLog.h>
+#include <chrono>
 
 namespace facebook {
 namespace react {
@@ -21,8 +22,8 @@ JSIExecutor::RuntimeInstaller RCTJSIExecutorRuntimeInstaller(JSIExecutor::Runtim
     bindNativeLogger(runtime, iosLoggingBinder);
 
     PerformanceNow iosPerformanceNowBinder = []() {
-      // CACurrentMediaTime() returns the current absolute time, in seconds
-      return CACurrentMediaTime() * 1000;
+      auto time = std::chrono::system_clock::now().time_since_epoch();
+      return std::chrono::duration_cast<std::chrono::milliseconds>(time).count();
     };
     bindNativePerformanceNow(runtime, iosPerformanceNowBinder);
 
diff --git a/ReactAndroid/src/main/jni/react/jni/NativeTime.cpp b/ReactAndroid/src/main/jni/react/jni/NativeTime.cpp
index 05eb72b49bc..f0ed4ced09b 100644
--- a/ReactAndroid/src/main/jni/react/jni/NativeTime.cpp
+++ b/ReactAndroid/src/main/jni/react/jni/NativeTime.cpp
@@ -12,14 +12,8 @@ namespace facebook {
 namespace react {
 
 double reactAndroidNativePerformanceNowHook() {
-  auto time = std::chrono::steady_clock::now();
-  auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>(
-                      time.time_since_epoch())
-                      .count();
-
-  constexpr double NANOSECONDS_IN_MILLISECOND = 1000000.0;
-
-  return duration / NANOSECONDS_IN_MILLISECOND;
+  auto time = std::chrono::system_clock::now().time_since_epoch();
+  return std::chrono::duration_cast<std::chrono::milliseconds>(time).count();
 }
 
 } // namespace react