diff --git a/home-manager/fish.nix b/home-manager/fish.nix
index 7caf1b3..6eb627b 100644
--- a/home-manager/fish.nix
+++ b/home-manager/fish.nix
@@ -56,6 +56,7 @@
     functions = {
       ns = "nix shell nixpkgs#$argv[1]";
       nss = "nix shell nixpkgs#$argv[1] -c $argv";
+      epoch = "date --date +\"@$argv[1]\"";
     };
 
     shellAbbrs = {