diff --git a/main.zig b/main.zig
index 6fcb778740a5b6b30ce3e4bfa5634ec7a732eb5a..89ea53222a3329293963b9aec7639537900f039a 100644
--- a/main.zig
+++ b/main.zig
@@ -49,3 +49,5 @@ test { try assertOk(1144509852789, "Y",    "12006"); }
 test { try assertOk(1144509852789, "YY",   "06"); }
 test { try assertOk(1144509852789, "YYY",  "2006"); }
 test { try assertOk(1144509852789, "YYYY",  "2006"); }
+test { try assertOk(1144509852789, "N",    "AD"); }
+test { try assertOk(1144509852789, "NN",   "Anno Domini"); }
diff --git a/time.zig b/time.zig
index f5e49db1c18e77488b963ae9cf66dcfacba16dfa..e983e4c20124d90d166c6f2a94cc528737dc0cca 100644
--- a/time.zig
+++ b/time.zig
@@ -254,6 +254,8 @@ pub const DateTime = struct {
                     .Y => try writer.print("{}", .{self.years + 10000}),
                     .YY => try writer.print("{:0>2}", .{self.years % 100}),
                     .YYY => try writer.print("{}", .{self.years}),
+                    .N => try writer.writeAll(@tagName(self.era)),
+                    .NN => try writer.writeAll("Anno Domini"),
 
                     else => @compileError("'" ++ @tagName(tag) ++ "' not currently supported"),
                 }