diff --git a/Cesium.Compiler/stdlib/time.h b/Cesium.Compiler/stdlib/time.h
new file mode 100644
index 00000000..5a7774d7
--- /dev/null
+++ b/Cesium.Compiler/stdlib/time.h
@@ -0,0 +1,6 @@
+#pragma once
+
+typedef long time_t;
+
+__cli_import("Cesium.Runtime.TimeFunctions::Time")
+time_t time(time_t* arg);
diff --git a/Cesium.Runtime/TimeFunctions.cs b/Cesium.Runtime/TimeFunctions.cs
new file mode 100644
index 00000000..2cc195e5
--- /dev/null
+++ b/Cesium.Runtime/TimeFunctions.cs
@@ -0,0 +1,15 @@
+namespace Cesium.Runtime;
+
+public static unsafe class TimeFunctions
+{
+    public static long Time(long* time)
+    {
+        var result = (DateTime.UtcNow - new DateTime(0)).TotalSeconds;
+        if (time is not null)
+        {
+            *time = (long)result;
+        }
+
+        return (long)result;
+    }
+}