diff --git a/at-3.2.5-past-date.patch b/at-3.2.5-past-date.patch
new file mode 100644
index 0000000..6344c40
--- /dev/null
+++ b/at-3.2.5-past-date.patch
@@ -0,0 +1,33 @@
+From 6c131df8c85cb2761faf551f8f9db179e216fc09 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Ond=C5=99ej=20Poho=C5=99elsk=C3=BD?= <opohorel@redhat.com>
+Date: Wed, 25 Jun 2025 14:35:31 +0200
+Subject: [PATCH] Reject past dates when using -t option
+
+-t option was missing validation to reject past dates, unlike the
+regular time parsing.
+
+Add the same past date validation used by parsetime() to the posixtime()
+code path to ensure consistent behavior when parsing time.
+---
+ at.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/at.c b/at.c
+index 8d0feaa..3fb0582 100644
+--- a/at.c
++++ b/at.c
+@@ -951,6 +951,11 @@ main(int argc, char **argv)
+ 		fprintf(stderr, "invalid date format: %s\n", optarg);
+ 		exit(EXIT_FAILURE);
+ 	    }
++	    /* Check if the parsed time is in the past */
++	    if (timer < time(NULL)) {
++		fprintf(stderr, "at: refusing to create job destined in the past\n");
++		exit(EXIT_FAILURE);
++	    }
+ 	    break;
+ 
+ 	case 'o':
+-- 
+2.49.0
+
diff --git a/at.spec b/at.spec
index 0baaac6..5b89172 100644
--- a/at.spec
+++ b/at.spec
@@ -3,7 +3,7 @@
 Summary:    Job spooling tools
 Name:       at
 Version:    3.2.5
-Release:    12%{?dist}
+Release:    13%{?dist}
 # http://packages.debian.org/changelogs/pool/main/a/at/current/copyright
 # + install-sh is MIT license with changes under Public Domain
 License:    GPL-3.0-or-later AND GPL-2.0-or-later AND ISC
@@ -31,6 +31,7 @@ Patch:      at-3.2.2-lock-locks.patch
 Patch:      at-3.1.23-document-n.patch
 Patch:      at-3.1.20-log-jobs.patch
 Patch:      at-3.2.5-address-issues-from-static-analyzer.patch
+Patch:      at-3.2.5-past-date.patch
 
 BuildRequires: gcc
 BuildRequires: flex flex-static bison autoconf
@@ -165,6 +166,10 @@ chown root:root %{_localstatedir}/spool/at/.SEQ
 %attr(0644,root,root)       /%{_unitdir}/atd.service
 
 %changelog
+* Mon Jun 30 2025 Ondřej Pohořelský <opohorel@redhat.com> - 3.2.5-13
+- Add patch to fix past date handling
+- Resolves: RHEL-100334
+
 * Wed Nov 06 2024 Ondřej Pohořelský <opohorel@redhat.com> - 3.2.5-12
 - Address issues from static analyzer
   Resolves: RHEL-44999