diff --git a/csharp/Lib/Time/Unix/UnixTime.cs b/csharp/Lib/Time/Unix/UnixTime.cs
index f771fd01d..b370ad764 100644
--- a/csharp/Lib/Time/Unix/UnixTime.cs
+++ b/csharp/Lib/Time/Unix/UnixTime.cs
@@ -8,5 +8,7 @@ public readonly partial struct UnixTime
 {
     // IMPORTANT: init is necessary for JSON deserializer
     // ReSharper disable once AutoPropertyCanBeMadeGetOnly.Global
-    public UInt32 Ticks { get; init; } 
+    public UInt32 Ticks { get; init; }
+
+    public UnixTime RoundTo(UnixTimeSpan span) => Epoch + this / span * span;
 }
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