diff --git a/templates/usr/local/lib/systemd/system/rosetta_maintenance_begin.timer.j2 b/templates/usr/local/lib/systemd/system/rosetta_maintenance_begin.timer.j2
index 32991bc2f1fa90f1f122f9f5c7f501bbb227b8df..bcbf33ad7e5d3433789aedf511411b5a70d1b0e3 100644
--- a/templates/usr/local/lib/systemd/system/rosetta_maintenance_begin.timer.j2
+++ b/templates/usr/local/lib/systemd/system/rosetta_maintenance_begin.timer.j2
@@ -4,8 +4,14 @@ Description=timer for rosetta_maintenance.service
 [Timer]
 # run on the 1st Tuesday of each month
 # You can validate your calendar expressions using `systemd-analyze calendar EXPR`.
-OnCalendar=Tue *-*-01..07 08:00:00
-Unit=rosetta_maintenance_begin
+# Of course, the expression we use on our Debian systems won't work on the
+# jurassic RHEL versions of systemd 219, because the ".." syntax for timespans
+# in calendar events isn't supported yet. Instead, we have to use the older
+# syntax that explicitely lists all days separated by commas.
+# One more reason for RHEL to fuck ALL THE WAY OFF!
+# OnCalendar=Tue *-*-01..07 08:00:00    # NOT THIS on RHEL 7!
+OnCalendar=Tue *-*-01,02,03,04,05,06,07 08:00:00
+Unit=rosetta_maintenance_begin.service
 
 [Install]
 WantedBy=default.target
diff --git a/templates/usr/local/lib/systemd/system/rosetta_maintenance_end.timer.j2 b/templates/usr/local/lib/systemd/system/rosetta_maintenance_end.timer.j2
index 7a5522d4a6283b3c0b5c98ec1671b0872edd90fe..da46ac3e6beec5d845daee5bd57f41a66843b1a9 100644
--- a/templates/usr/local/lib/systemd/system/rosetta_maintenance_end.timer.j2
+++ b/templates/usr/local/lib/systemd/system/rosetta_maintenance_end.timer.j2
@@ -4,7 +4,13 @@ Description=timer for rosetta_maintenance.service
 [Timer]
 # run on the 1st Tuesday of each month
 # You can validate your calendar expressions using `systemd-analyze calendar EXPR`.
-OnCalendar=Tue *-*-01..07 11:00:00
+# Of course, the expression we use on our Debian systems won't work on the
+# jurassic RHEL versions of systemd 219, because the ".." syntax for timespans
+# in calendar events isn't supported yet. Instead, we have to use the older
+# syntax that explicitely lists all days separated by commas.
+# One more reason for RHEL to fuck ALL THE WAY OFF!
+# OnCalendar=Tue *-*-01..07 08:00:00    # NOT THIS on RHEL 7!
+OnCalendar=Tue *-*-01,02,03,04,05,06,07 11:00:00
 Unit=exlibris.service
 
 [Install]