diff -u -r mozc-2.23.2815.102+dfsg.orig/src/rewriter/date_rewriter.cc mozc-2.23.2815.102+dfsg/src/rewriter/date_rewriter.cc
--- mozc-2.23.2815.102+dfsg.orig/src/rewriter/date_rewriter.cc	2018-04-03 08:03:55.000000000 +0900
+++ mozc-2.23.2815.102+dfsg/src/rewriter/date_rewriter.cc	2020-05-06 08:30:37.048159659 +0900
@@ -1239,6 +1239,10 @@
     1989,
     "平成",
     "へいせい",
+  }, {
+    2019,
+    "令和",
+    "れいわ",
   }
 };
 
diff -u -r mozc-2.23.2815.102+dfsg.orig/src/rewriter/date_rewriter_test.cc mozc-2.23.2815.102+dfsg/src/rewriter/date_rewriter_test.cc
--- mozc-2.23.2815.102+dfsg.orig/src/rewriter/date_rewriter_test.cc	2018-04-03 08:03:55.000000000 +0900
+++ mozc-2.23.2815.102+dfsg/src/rewriter/date_rewriter_test.cc	2020-05-06 08:32:07.228639494 +0900
@@ -469,6 +469,22 @@
                  "平成10",
                  "平成十");
 
+  // AD.2019 is "平成31(年)" or "平成三十一(年)" or "令和元(年)"
+  results.clear();
+  rewriter.AdToEra(2019, &results);
+  Expect3Results(results,
+                 "平成31",
+                 "平成三十一",
+                 "令和元");
+
+  // AD.2020 is "令和2(年)" or "令和二(年)"
+  results.clear();
+  rewriter.AdToEra(2020, &results);
+  EXPECT_EQ(results.size(), 2);
+  Expect2Results(results,
+            "令和2",
+            "令和二");
+
   // Negative Test
   // Too big number or negative number input are expected false return
   results.clear();