diff --git a/_board/sensebox_mcu.md b/_board/sensebox_mcu.md
index f26c0306..3657bb47 100644
--- a/_board/sensebox_mcu.md
+++ b/_board/sensebox_mcu.md
@@ -6,6 +6,7 @@ name: "senseBox MCU"
 manufacturer: "senseBox"
 board_url: "https://docs.sensebox.de/hardware/allgemein-sensebox-mcu/"
 board_image: "sensebox_mcu.jpg"
+date_added: 2021-4-12
 ---
 
 The senseBox-microcontroller (MCU) is specially designed and developed for the [senseBox project](https://sensebox.de/en/). The three main advantages and characteristics of the microcontroller are: expandability, speed, and efficiency.