diff --git a/.github/actions/workflow-results/parse-job-times.py b/.github/actions/workflow-results/parse-job-times.py
index e30e213de34..79723bf3089 100755
--- a/.github/actions/workflow-results/parse-job-times.py
+++ b/.github/actions/workflow-results/parse-job-times.py
@@ -76,9 +76,11 @@ def main():
         # Job times are 2024-05-09T06:52:20Z
         started_at = job['started_at']
         started_time = datetime.datetime.strptime(started_at, "%Y-%m-%dT%H:%M:%SZ")
+        started_time_epoch_secs = started_time.timestamp()
 
         completed_at = job['completed_at']
         completed_time = datetime.datetime.strptime(completed_at, "%Y-%m-%dT%H:%M:%SZ")
+        completed_time_epoch_secs = completed_time.timestamp()
 
         job_seconds = (completed_time - started_time).total_seconds()
         job_duration = str(datetime.timedelta(seconds=job_seconds))
@@ -87,6 +89,8 @@ def main():
         result[id]['name'] = name
         result[id]['started_at'] = started_at
         result[id]['completed_at'] = completed_at
+        result[id]['started_epoch_secs'] = started_time_epoch_secs
+        result[id]['completed_epoch_secs'] = completed_time_epoch_secs
         result[id]['job_duration'] = job_duration
         result[id]['job_seconds'] = job_seconds
 
diff --git a/.github/actions/workflow-results/prepare-execution-summary.py b/.github/actions/workflow-results/prepare-execution-summary.py
index 61cfc43f449..07dbdde8df3 100755
--- a/.github/actions/workflow-results/prepare-execution-summary.py
+++ b/.github/actions/workflow-results/prepare-execution-summary.py
@@ -70,11 +70,14 @@ def update_summary_entry(entry, job, job_times=None):
 
         if not 'job_time' in entry:
             entry['job_time'] = 0
-        if not 'step_time' in entry:
-            entry['step_time'] = 0
+        if not 'command_time' in entry:
+            entry['command_time'] = 0
+        if not 'max_job_time' in entry:
+            entry['max_job_time'] = 0
 
         entry['job_time'] += job_time
-        entry['step_time'] += command_time
+        entry['command_time'] += command_time
+        entry['max_job_time'] = max(entry['max_job_time'], job_time)
 
     sccache_stats = get_sccache_stats(job["id"])
     if sccache_stats:
@@ -159,6 +162,20 @@ def rank_tag(tag_summary):
     return summary
 
 
+def get_walltime(job_times):
+    "Return the walltime for all jobs in seconds."
+    start = None
+    end = None
+    for job_id, job_time in job_times.items():
+        job_start_timestamp = job_time['started_epoch_secs']
+        job_end_timestamp = job_time['completed_epoch_secs']
+        if not start or job_start_timestamp < start:
+            start = job_start_timestamp
+        if not end or job_end_timestamp > end:
+            end = job_end_timestamp
+    return end - start
+
+
 def format_seconds(seconds):
     days, remainder = divmod(seconds, 86400)
     hours, remainder = divmod(remainder, 3600)
@@ -187,9 +204,11 @@ def get_summary_stats(summary):
 
     if 'job_time' in summary and total > 0 and summary['job_time'] > 0:
         job_time = summary['job_time']
+        max_job_time = summary['max_job_time']
         total_job_duration = format_seconds(job_time)
         avg_job_duration = format_seconds(job_time / total)
-        stats += f' | Total Time: {total_job_duration:>7} | Avg Time: {avg_job_duration:>7}'
+        max_job_duration = format_seconds(max_job_time)
+        stats += f' | Total: {total_job_duration:>7} | Avg: {avg_job_duration:>7} | Max: {max_job_duration:>7}'
 
     if 'sccache' in summary:
         sccache = summary['sccache']
@@ -202,7 +221,7 @@ def get_summary_stats(summary):
     return stats
 
 
-def get_summary_heading(summary):
+def get_summary_heading(summary, walltime):
     passed = summary['passed']
     failed = summary['failed']
 
@@ -213,7 +232,7 @@ def get_summary_heading(summary):
     else:
         flag = '🟩'
 
-    return f'{flag} CI Results: {get_summary_stats(summary)}'
+    return f'{flag} CI finished in {walltime}: {get_summary_stats(summary)}'
 
 
 def get_project_heading(project, project_summary):
@@ -308,10 +327,11 @@ def write_project_summary(idx, project, project_summary):
 
 def write_workflow_summary(workflow, job_times=None):
     summary = build_summary(extract_jobs(workflow), job_times)
+    walltime = format_seconds(get_walltime(job_times)) if job_times else '[unknown]'
 
     os.makedirs('execution/projects', exist_ok=True)
 
-    write_text('execution/heading.txt', get_summary_heading(summary))
+    write_text('execution/heading.txt', get_summary_heading(summary, walltime))
 
     # Sort summary projects so that projects with failures come first, and ties
     # are broken by the total number of jobs: