diff --git a/3D_Printed_Unicorn_Horn/3D_Printed_Unicorn_Horn.ino b/3D_Printed_Unicorn_Horn/3D_Printed_Unicorn_Horn.ino
index a11e4ce6c..31bccc937 100644
--- a/3D_Printed_Unicorn_Horn/3D_Printed_Unicorn_Horn.ino
+++ b/3D_Printed_Unicorn_Horn/3D_Printed_Unicorn_Horn.ino
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2015 Phil Burgess for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+//
 #include <Adafruit_NeoPixel.h>
 
 #define PIN 1
diff --git a/3D_Printed_Unicorn_Horn/code.py b/3D_Printed_Unicorn_Horn/code.py
index 8cb2d15b6..99e664221 100644
--- a/3D_Printed_Unicorn_Horn/code.py
+++ b/3D_Printed_Unicorn_Horn/code.py
@@ -1,3 +1,8 @@
+# SPDX-FileCopyrightText: 2017 Mikey Sklar for Adafruit Industries
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+#
 import time
 
 import board
diff --git a/Activity_Generator/code.py b/Activity_Generator/code.py
index f063f21a9..8b325dce6 100755
--- a/Activity_Generator/code.py
+++ b/Activity_Generator/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2020 Collin Cunningham for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+#
 """ACTIVITY GENERATOR for Adafruit CLUE"""
 
 import time
diff --git a/Activity_Generator/things.py b/Activity_Generator/things.py
index ae05d0a11..84ff281b0 100755
--- a/Activity_Generator/things.py
+++ b/Activity_Generator/things.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2020 Collin Cunningham for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+#
 activities = [
     "DRAWING",
     "SONG",
diff --git a/Ada_BLE_RC/Ada_BLE_RC.ino b/Ada_BLE_RC/Ada_BLE_RC.ino
index d672a7380..1f1133092 100644
--- a/Ada_BLE_RC/Ada_BLE_RC.ino
+++ b/Ada_BLE_RC/Ada_BLE_RC.ino
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2016 James DeVito for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+//
 /*********************************************************************
  This is an example for our nRF51822 based Bluefruit LE modules
   
diff --git a/Ada_BLE_RC/BluefruitConfig.h b/Ada_BLE_RC/BluefruitConfig.h
index 57efc594d..beabe4237 100644
--- a/Ada_BLE_RC/BluefruitConfig.h
+++ b/Ada_BLE_RC/BluefruitConfig.h
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2016 James DeVito for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+//
 // COMMON SETTINGS
 // ----------------------------------------------------------------------------------------------
 // These settings are used in both SW UART, HW UART and SPI mode
diff --git a/Ada_BLE_RC/packetParser.cpp b/Ada_BLE_RC/packetParser.cpp
index aa0201bef..272c7a881 100644
--- a/Ada_BLE_RC/packetParser.cpp
+++ b/Ada_BLE_RC/packetParser.cpp
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2016 James DeVito for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+//
 #include <string.h>
 #include <Arduino.h>
 #include <SPI.h>
diff --git a/Ada_remoteFXTrigger_NeoTrellis_FastLED_RX/Ada_remoteFXTrigger_NeoTrellis_FastLED_RX.ino b/Ada_remoteFXTrigger_NeoTrellis_FastLED_RX/Ada_remoteFXTrigger_NeoTrellis_FastLED_RX.ino
index ae100f688..b41056b7c 100644
--- a/Ada_remoteFXTrigger_NeoTrellis_FastLED_RX/Ada_remoteFXTrigger_NeoTrellis_FastLED_RX.ino
+++ b/Ada_remoteFXTrigger_NeoTrellis_FastLED_RX/Ada_remoteFXTrigger_NeoTrellis_FastLED_RX.ino
@@ -1,3 +1,8 @@
+// SPDX-FileCopyrightText: 2019 Erin St. Blaine for Adafruit Industries
+// SPDX-FileCopyrightText: 2019 John Edgar Park for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+//
 //Ada_remoteFXTrigger_RX_NeoPixel
 //Remote Effects Trigger Box Receiver
 //by John Park & Erin St Blaine
diff --git a/Ada_remoteFXTrigger_NeoTrellis_FastLED_TX/Ada_remoteFXTrigger_NeoTrellis_FastLED_TX.ino b/Ada_remoteFXTrigger_NeoTrellis_FastLED_TX/Ada_remoteFXTrigger_NeoTrellis_FastLED_TX.ino
index 10a522501..463c9540a 100644
--- a/Ada_remoteFXTrigger_NeoTrellis_FastLED_TX/Ada_remoteFXTrigger_NeoTrellis_FastLED_TX.ino
+++ b/Ada_remoteFXTrigger_NeoTrellis_FastLED_TX/Ada_remoteFXTrigger_NeoTrellis_FastLED_TX.ino
@@ -1,3 +1,8 @@
+// SPDX-FileCopyrightText: 2019 Erin St. Blaine for Adafruit Industries
+// SPDX-FileCopyrightText: 2019 John Edgar Park for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+//
 //Ada_remoteFXTrigger_NeoTrellis_TX
 //Remote Effects Trigger Box Transmitter
 //by John Park
diff --git a/Adabot_Operation_Game/code.py b/Adabot_Operation_Game/code.py
index e17be76ad..c88d346c6 100644
--- a/Adabot_Operation_Game/code.py
+++ b/Adabot_Operation_Game/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2018 John Park for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+#
 # Adabot Operation Game
 #  CPX, alligator clips, copper tape, tweezers, surgery, and fun!