From ced8d72808810c69703f52eda1f48accdd9181fa Mon Sep 17 00:00:00 2001
From: "Simon V." <218359733+sim0n-v@users.noreply.github.com>
Date: Fri, 3 Jul 2026 09:12:32 +0200
Subject: [PATCH] ARI - Run cron job more frequently (#6939)
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* ARI - Run cron job more frequently

With ACME Renewal Info (RFC9773 §4.3), fetching renewal window should be more frequent, e.g. in case of revocation incident.
"For instance, a server that needs to revoke certificates within 24 hours of notification of a problem might choose to reserve twelve hours for investigation, six hours for clients to fetch updated RenewalInfo objects, and six hours for clients to perform a renewal."

More flexible option is to run the cron job every hour and only refresh ARI when the last one + Retry-After header is in the past.

* Fix cron job schedule for certificate renewal

* Fix random_hour syntax in cron job installation

* Update Windows task scheduler to run more frequently

Add support for randomized hour and update frequency

Ref:
* [/mo](https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-create#to-schedule-a-task-to-run-every-n-hours)
* [/SC HOURLY](https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/schtasks-create#parameters)

* Add padding for StartTime (/ST) in SCHTASKS.exe

* New Banner

Updated README to include responsive images for dark and light modes.

* rebase

* Reset README

---------

Co-authored-by: ZeroSSL-Andreas <andreas.schuster@hidglobal.com>
---
 acme.sh | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/acme.sh b/acme.sh
index d714d421..ad7a6325 100755
--- a/acme.sh
+++ b/acme.sh
@@ -6470,6 +6470,7 @@ _install_win_taskscheduler() {
   _lesh="$1"
   _centry="$2"
   _randomminute="$3"
+  _randomhour="$4"
   if ! _exists cygpath; then
     _err "cygpath not found"
     return 1
@@ -6539,7 +6540,7 @@ installcronjob() {
   fi
   _t=$(_time)
   random_minute=$(_math $_t % 60)
-  random_hour=$(_math $_t / 60 % 24)
+  random_hour=$(_math $_t / 60 % 6)
 
   if ! _exists "$_CRONTAB" && _exists "fcrontab"; then
     _CRONTAB="fcrontab"
@@ -6548,7 +6549,7 @@ installcronjob() {
   if ! _exists "$_CRONTAB"; then
     if _exists cygpath && _exists schtasks.exe; then
       _info "It seems you are on Windows, let's install the Windows scheduler task."
-      if _install_win_taskscheduler "$lesh" "$_c_entry" "$random_minute"; then
+      if _install_win_taskscheduler "$lesh" "$_c_entry" "$random_minute" "$random_hour"; then
         _info "Successfully installed Windows scheduler task."
         return 0
       else
@@ -6570,7 +6571,7 @@ installcronjob() {
     fi
     $_CRONTAB -l 2>/dev/null | {
       cat
-      echo "$random_minute $random_hour * * * $lesh --cron --home \"$LE_WORKING_DIR\" $_c_entry> /dev/null"
+      echo "$random_minute $random_hour,$(_math $random_hour + 6),$(_math $random_hour + 12),$(_math $random_hour + 18) * * * $lesh --cron --home \"$LE_WORKING_DIR\" $_c_entry> /dev/null"
     } | $_CRONTAB_STDIN
   fi
   if [ "$?" != "0" ]; then