diff --git a/days-off.md b/days-off.md
index b3f3bce..5df5075 100644
--- a/days-off.md
+++ b/days-off.md
@@ -16,6 +16,9 @@ Federal holidays:
  * Thanksgiving Day
  * Christmas Day
 
+ And the real labor day:
+ * May First
+
 Source: [opm.gov/policy-data-oversight/pay-leave/federal-holidays](https://www.opm.gov/policy-data-oversight/pay-leave/federal-holidays/)
 
 Given that most of these move around year to year to be the closest Monday, we have added the .ics file OPM provided (goes through 2030) to the [Agaric shared calendar](calendars) via Thunderbird's "Events & Tasks » Import".