diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5470dd7a..6341431e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Nakama: `ISession.CreateTime` now accurately represents Unix time in seconds since the `ISession` object was created.
 
 ## [3.12.0] - 2024-04-08
 ### Added
diff --git a/Nakama.Tests/AuthenticateTest.cs b/Nakama.Tests/AuthenticateTest.cs
index 064b2d44..453d80bb 100644
--- a/Nakama.Tests/AuthenticateTest.cs
+++ b/Nakama.Tests/AuthenticateTest.cs
@@ -41,6 +41,7 @@ public async Task ShouldAuthenticateCustomId()
             Assert.NotNull(session.UserId);
             Assert.NotNull(session.Username);
             Assert.False(session.IsExpired);
+            Assert.Equal(DateTimeOffset.UtcNow.ToUnixTimeSeconds(), session.CreateTime);
         }
 
         [Fact(Timeout = TestsUtil.TIMEOUT_MILLISECONDS)]
diff --git a/Nakama/Session.cs b/Nakama/Session.cs
index d9d070ec..40256bd1 100644
--- a/Nakama/Session.cs
+++ b/Nakama/Session.cs
@@ -85,8 +85,7 @@ public override string ToString()
         internal Session(string authToken, string refreshToken, bool created)
         {
             Created = created;
-            var span = DateTime.UtcNow - Epoch;
-            CreateTime = span.Seconds;
+            CreateTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
             RefreshExpireTime = 0L;
             Vars = new Dictionary<string, string>();