diff --git a/dist/index.js b/dist/index.js
index 7181be2..0768436 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -9514,6 +9514,7 @@ function run(context) {
         const vars = {
             vote_period_days: config_1.VOTE_PERIOD_DAYS.toString(),
             vote_end_date: date.toUTCString(),
+            vote_end_date_iso: date.toISOString(),
         };
         yield (0, bot_1.commentToIssue)(context, template, vars);
     });
diff --git a/dist/vote-start.md b/dist/vote-start.md
index 996913b..a648715 100644
--- a/dist/vote-start.md
+++ b/dist/vote-start.md
@@ -12,3 +12,5 @@ This proposal targets **v1.0**. If approved it will be merged into the `1.0-rc`
 
 {{/release_candidate}}
 cc @{{{ steering_committee_team }}}
+
+<!-- ##bot-vote-deadline## {{ vote_end_date_iso }} -->
diff --git a/src/commands/voteStart.ts b/src/commands/voteStart.ts
index 12f0a17..c5a1233 100644
--- a/src/commands/voteStart.ts
+++ b/src/commands/voteStart.ts
@@ -20,6 +20,7 @@ export default async function run(context: Context) {
   const vars = {
     vote_period_days: VOTE_PERIOD_DAYS.toString(),
     vote_end_date: date.toUTCString(),
+    vote_end_date_iso: date.toISOString(),
   };
 
   await commentToIssue(context, template, vars);
diff --git a/src/templates/vote-start.md b/src/templates/vote-start.md
index 996913b..a648715 100644
--- a/src/templates/vote-start.md
+++ b/src/templates/vote-start.md
@@ -12,3 +12,5 @@ This proposal targets **v1.0**. If approved it will be merged into the `1.0-rc`
 
 {{/release_candidate}}
 cc @{{{ steering_committee_team }}}
+
+<!-- ##bot-vote-deadline## {{ vote_end_date_iso }} -->