diff --git a/cookbooks/fb_timers/README.md b/cookbooks/fb_timers/README.md
index 339a9482..5c363f96 100644
--- a/cookbooks/fb_timers/README.md
+++ b/cookbooks/fb_timers/README.md
@@ -52,6 +52,11 @@ A global attribute `node['fb_timers']['enable_named_slices']` controls whether
 the timer units that systemd sets up will be bound to an individual slice,
 versus using `timers.slice` for everything.
 
+This cookbook does not setup timers until `node.firstboot_any_phase?`
+phases are complete. This is due to timers not being required to bootstrap
+a new system. If you have a lot of timers, this cookbook can eat up a lot of
+first boot runtime.
+
 ### Fields
 Required fields:
 
diff --git a/cookbooks/fb_timers/recipes/default.rb b/cookbooks/fb_timers/recipes/default.rb
index 82178c5a..bd7514b8 100644
--- a/cookbooks/fb_timers/recipes/default.rb
+++ b/cookbooks/fb_timers/recipes/default.rb
@@ -59,5 +59,5 @@
 end
 
 fb_timers_setup 'fb_timers system setup' do
-  not_if { (node.firstboot_os? || node.firstboot_tier?) && node.in_shard?(79) }
+  not_if { node.firstboot_os? || node.firstboot_tier? }
 end