diff --git a/smash/web/models/constants.py b/smash/web/models/constants.py
index ad7354a0bda27a3c369369e0425657fa6499e708..60e0c5aa2e84b089a3d651ed3ba13f0aabd4eee2 100644
--- a/smash/web/models/constants.py
+++ b/smash/web/models/constants.py
@@ -78,6 +78,11 @@ WEEKDAY_CHOICES = (
     (SUNDAY_AS_DAY_OF_WEEK, 'SUNDAY'),
 )
 
+AVAILABILITY_CHOICES = (
+    ('H', 'Holiday'),
+    ('X', 'Extra Availability'),
+)
+
 REDCAP_TOKEN_CONFIGURATION_TYPE = "REDCAP_TOKEN_CONFIGURATION_TYPE"
 REDCAP_BASE_URL_CONFIGURATION_TYPE = "REDCAP_BASE_URL_CONFIGURATION_TYPE"