diff --git a/2025-03-31.md b/2025-03-31.md
index 43fa1cba2..ac0a4f8ea 100644
--- a/2025-03-31.md
+++ b/2025-03-31.md
@@ -2,3 +2,4 @@
   - It was a great day all in all, I had enough bandwidth to do what I needed to do and start the week well; did also some planning for the upcoming months.
 - Had lunch with [[Stapelberg]].
 - Worked until 19 or until 21 depending on how you count, I count the latter.
+- Threw [[476]] in the [[co2]] meter; it's 17 * 28.