diff --git a/src/consensus/activation.h b/src/consensus/activation.h
--- a/src/consensus/activation.h
+++ b/src/consensus/activation.h
@@ -35,4 +35,8 @@
 bool IsPhononEnabled(const Consensus::Params &params,
                      const CBlockIndex *pindexPrev);
 
+/** Check if November 15th, 2020 protocol upgrade has activated. */
+bool IsAxionEnabled(const Consensus::Params &params,
+                    const CBlockIndex *pindexPrev);
+
 #endif // BITCOIN_CONSENSUS_ACTIVATION_H
diff --git a/src/consensus/activation.cpp b/src/consensus/activation.cpp
--- a/src/consensus/activation.cpp
+++ b/src/consensus/activation.cpp
@@ -71,3 +71,13 @@
     return pindexPrev->GetMedianTimePast() >=
            gArgs.GetArg("-phononactivationtime", params.phononActivationTime);
 }
+
+bool IsAxionEnabled(const Consensus::Params &params,
+                    const CBlockIndex *pindexPrev) {
+    if (pindexPrev == nullptr) {
+        return false;
+    }
+
+    return pindexPrev->GetMedianTimePast() >=
+           gArgs.GetArg("-axionactivationtime", params.axionActivationTime);
+}
diff --git a/src/init.cpp b/src/init.cpp
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -363,7 +363,9 @@
         "-min", "-resetguisettings", "-rootcertificates=<file>", "-splash",
         "-uiplatform",
         // TODO remove after the May 2020 upgrade
-        "-phononactivationtime"};
+        "-phononactivationtime",
+        // TODO remove after the November 2020 upgrade
+        "-axionactivationtime"};
 
     // Set all of the args and their help
     // When adding new options to the categories, please keep and ensure
diff --git a/src/test/activation_tests.cpp b/src/test/activation_tests.cpp
--- a/src/test/activation_tests.cpp
+++ b/src/test/activation_tests.cpp
@@ -67,4 +67,30 @@
     BOOST_CHECK(IsPhononEnabled(params, &blocks.back()));
 }
 
+BOOST_AUTO_TEST_CASE(isaxionenabled) {
+    CBlockIndex prev;
+
+    const Consensus::Params &params = Params().GetConsensus();
+    const auto activation =
+        gArgs.GetArg("-axionactivationtime", params.axionActivationTime);
+    SetMockTime(activation - 1000000);
+
+    BOOST_CHECK(!IsAxionEnabled(params, nullptr));
+
+    std::array<CBlockIndex, 12> blocks;
+    for (size_t i = 1; i < blocks.size(); ++i) {
+        blocks[i].pprev = &blocks[i - 1];
+    }
+    BOOST_CHECK(!IsAxionEnabled(params, &blocks.back()));
+
+    SetMTP(blocks, activation - 1);
+    BOOST_CHECK(!IsAxionEnabled(params, &blocks.back()));
+
+    SetMTP(blocks, activation);
+    BOOST_CHECK(IsAxionEnabled(params, &blocks.back()));
+
+    SetMTP(blocks, activation + 1);
+    BOOST_CHECK(IsAxionEnabled(params, &blocks.back()));
+}
+
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/test/lint/check-doc.py b/test/lint/check-doc.py
--- a/test/lint/check-doc.py
+++ b/test/lint/check-doc.py
@@ -48,6 +48,8 @@
                                        '-automaticunparking',
                                        # Remove after May 2020 upgrade
                                        '-phononactivationtime',
+                                       # Remove after November 2020 upgrade
+                                       '-axionactivationtime',
                                        '-replayprotectionactivationtime',
                                        ])