diff --git a/dotnet/EcencyApi.Tests/CurationDeskPayloadTests.cs b/dotnet/EcencyApi.Tests/CurationDeskPayloadTests.cs
index 0ce218de..cf05fbbb 100644
--- a/dotnet/EcencyApi.Tests/CurationDeskPayloadTests.cs
+++ b/dotnet/EcencyApi.Tests/CurationDeskPayloadTests.cs
@@ -349,6 +349,9 @@ public void RosterFeedFiltersFollowThePublicFeedsValueRules()
         Assert.Equal("full", kept["window"]!.GetValue<string>());
         Assert.Equal("hive-125125", kept["community"]!.GetValue<string>());
         Assert.Equal("s:abc.1:25", kept["cursor"]!.GetValue<string>());
+        // The 12 h band is the newest window; a gateway behind the desk would drop it silently.
+        var shift = Ok(CurationDeskWrites.RosterFeed, "{\"window\":\"12h\"}");
+        Assert.Equal("12h", shift["window"]!.GetValue<string>());
 
         // Trailing newlines and non-ASCII digits are not the value either.
         var newline = Ok(CurationDeskWrites.RosterFeed, "{\"community\":\"hive-125125\\n\",\"cursor\":\"abc\\n\",\"view\":\"queue\\n\"}");
diff --git a/dotnet/EcencyApi.Tests/CurationDeskQueryTests.cs b/dotnet/EcencyApi.Tests/CurationDeskQueryTests.cs
index 78bc8590..8a592b24 100644
--- a/dotnet/EcencyApi.Tests/CurationDeskQueryTests.cs
+++ b/dotnet/EcencyApi.Tests/CurationDeskQueryTests.cs
@@ -105,6 +105,7 @@ public void EnumsAcceptOnlyTheirAllowlist()
         Assert.Equal("curation/desk/feed?app=peakd", Feed(("app", "peakd")));
         Assert.Equal("curation/desk/feed", Feed(("app", "hive")));
         Assert.Equal("curation/desk/feed?window=locked", Feed(("window", "locked")));
+        Assert.Equal("curation/desk/feed?window=12h", Feed(("window", "12h")));
         Assert.Equal("curation/desk/feed", Feed(("window", "week")));
         Assert.Equal("curation/desk/feed", Feed(("sort", "Queue")));
     }
diff --git a/dotnet/EcencyApi/Handlers/PrivateApi.CurationDesk.cs b/dotnet/EcencyApi/Handlers/PrivateApi.CurationDesk.cs
index 04f73aad..1f677d2e 100644
--- a/dotnet/EcencyApi/Handlers/PrivateApi.CurationDesk.cs
+++ b/dotnet/EcencyApi/Handlers/PrivateApi.CurationDesk.cs
@@ -552,7 +552,7 @@ public static class CurationDeskQuery
     public static readonly IReadOnlySet<string> Views =
         new HashSet<string> { "queue", "latest", "new-authors", "recommended", "curated", "all" };
     public static readonly IReadOnlySet<string> Apps = new HashSet<string> { "all", "ecency", "peakd", "other" };
-    public static readonly IReadOnlySet<string> Windows = new HashSet<string> { "full", "half", "eighth", "locked", "all" };
+    public static readonly IReadOnlySet<string> Windows = new HashSet<string> { "12h", "full", "half", "eighth", "locked", "all" };
 
     /// <summary>
     /// Emission order of the feed parameters. Fixed so that the memo key and