diff --git a/libraries/chain/hardfork.d/SON.hf b/libraries/chain/hardfork.d/SON.hf
new file mode 100644
index 00000000..badde1f4
--- /dev/null
+++ b/libraries/chain/hardfork.d/SON.hf
@@ -0,0 +1,4 @@
+// SON HARDFORK Monday, September 21, 2020 1:43:11 PM
+#ifndef HARDFORK_SON_TIME
+#define HARDFORK_SON_TIME (fc::time_point_sec( 1600695791 ))
+#endif
\ No newline at end of file