2 files changed, 11 insertions, 0 deletions
diff --git a/absl/time/internal/cctz/include/cctz/civil_time_detail.h b/absl/time/internal/cctz/include/cctz/civil_time_detail.h
index 5fe0967f..d7f72717 100644
--- a/absl/time/internal/cctz/include/cctz/civil_time_detail.h
+++ b/absl/time/internal/cctz/include/cctz/civil_time_detail.h
@@ -416,6 +416,12 @@ class civil_time {
     return difference(T{}, lhs.f_, rhs.f_);
   }
 
+  template <typename H>
+  friend H AbslHashValue(H h, civil_time a) {
+    return H::combine(std::move(h), a.f_.y, a.f_.m, a.f_.d,
+                                    a.f_.hh, a.f_.mm, a.f_.ss);
+  }
+
  private:
   // All instantiations of this template are allowed to call the following
   // private constructor and access the private fields member.
diff --git a/absl/time/internal/cctz/include/cctz/time_zone.h b/absl/time/internal/cctz/include/cctz/time_zone.h
index c86a5552..f28dad17 100644
--- a/absl/time/internal/cctz/include/cctz/time_zone.h
+++ b/absl/time/internal/cctz/include/cctz/time_zone.h
@@ -224,6 +224,11 @@ class time_zone {
     return !(lhs == rhs);
   }
 
+  template <typename H>
+  friend H AbslHashValue(H h, time_zone tz) {
+    return H::combine(std::move(h), &tz.effective_impl());
+  }
+
   class Impl;
 
  private: