diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0223767472..7386b984e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -37,6 +37,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Traffic Ops: Sanitize username before executing LDAP query
 - [#6367](https://github.com/apache/trafficcontrol/issues/6367) - Fix PUT `user/current` to work with v4 User Roles and Permissions
 - [#6266](https://github.com/apache/trafficcontrol/issues/6266) - Removed postgresql13-devel requirement for traffic_ops
+- [#6446](https://github.com/apache/trafficcontrol/issues/6446) - Revert Traffic Router rollover file pattern to the one previously used in `log4j.properties` with Log4j 1.2
 
 ### Changed
 - Updated `t3c` to request less unnecessary deliveryservice-server assignment and invalidation jobs data via new query params supported by Traffic Ops
diff --git a/infrastructure/ansible/roles/traffic-router/defaults/main.yml b/infrastructure/ansible/roles/traffic-router/defaults/main.yml
index 2ef0434f14..0fa2313d1d 100644
--- a/infrastructure/ansible/roles/traffic-router/defaults/main.yml
+++ b/infrastructure/ansible/roles/traffic-router/defaults/main.yml
@@ -135,7 +135,7 @@ tr_log4j2_opts: |
           </Console>
           <RollingFile name="traffic_router_access"
                        fileName="{{tr_log_dir}}/access.log"
-                       filePattern="{{tr_log_dir}}/access-%d{yyyy-MM-dd}.log" >
+                       filePattern="{{tr_log_dir}}/access.log.%i" >
               <PatternLayout pattern="%m%n" />
               <Policies>
                   <SizeBasedTriggeringPolicy size="200MB" />
@@ -145,11 +145,12 @@ tr_log4j2_opts: |
           </RollingFile>
           <RollingFile name="traffic_router"
                        fileName="{{tr_log_dir}}/traffic_router.log"
-                       filePattern="{{tr_log_dir}}/traffic_router-%d{yyyy-MM-dd}.log" >
+                       filePattern="{{tr_log_dir}}/traffic_router.log.%i" >
               <PatternLayout pattern="%-5p %d{yyyy-MM-dd'T'HH:mm:ss.SSS} [%t] %c - %m%n" />
               <Policies>
                   <SizeBasedTriggeringPolicy size="100MB" />
               </Policies>
+              <DefaultRolloverStrategy max="1" />
               <ThresholdFilter level="ALL" />
           </RollingFile>
       </Appenders>
diff --git a/traffic_router/core/src/main/conf/log4j2.xml b/traffic_router/core/src/main/conf/log4j2.xml
index 33bdde4a65..5984d9d0e4 100644
--- a/traffic_router/core/src/main/conf/log4j2.xml
+++ b/traffic_router/core/src/main/conf/log4j2.xml
@@ -20,7 +20,7 @@
         </Console>
         <RollingFile name="traffic_router_access"
                      fileName="${deploy.dir}/var/log/access.log"
-                     filePattern="${deploy.dir}/var/log/access-%d{yyyy-MM-dd}.log" >
+                     filePattern="${deploy.dir}/var/log/access.log.%i" >
             <PatternLayout pattern="%m%n" />
             <Policies>
                 <SizeBasedTriggeringPolicy size="200MB" />
@@ -30,11 +30,12 @@
         </RollingFile>
         <RollingFile name="traffic_router"
                      fileName="${deploy.dir}/var/log/traffic_router.log"
-                     filePattern="${deploy.dir}/var/log/traffic_router-%d{yyyy-MM-dd}.log" >
+                     filePattern="${deploy.dir}/var/log/traffic_router.log.%i" >
             <PatternLayout pattern="%-5p %d{yyyy-MM-dd'T'HH:mm:ss.SSS} [%t] %c - %m%n" />
             <Policies>
                 <SizeBasedTriggeringPolicy size="100MB" />
             </Policies>
+            <DefaultRolloverStrategy max="1" />
             <ThresholdFilter level="ALL" />
         </RollingFile>
     </Appenders>
diff --git a/traffic_router/core/src/test/conf/log4j2.xml b/traffic_router/core/src/test/conf/log4j2.xml
index 33bdde4a65..5984d9d0e4 100644
--- a/traffic_router/core/src/test/conf/log4j2.xml
+++ b/traffic_router/core/src/test/conf/log4j2.xml
@@ -20,7 +20,7 @@
         </Console>
         <RollingFile name="traffic_router_access"
                      fileName="${deploy.dir}/var/log/access.log"
-                     filePattern="${deploy.dir}/var/log/access-%d{yyyy-MM-dd}.log" >
+                     filePattern="${deploy.dir}/var/log/access.log.%i" >
             <PatternLayout pattern="%m%n" />
             <Policies>
                 <SizeBasedTriggeringPolicy size="200MB" />
@@ -30,11 +30,12 @@
         </RollingFile>
         <RollingFile name="traffic_router"
                      fileName="${deploy.dir}/var/log/traffic_router.log"
-                     filePattern="${deploy.dir}/var/log/traffic_router-%d{yyyy-MM-dd}.log" >
+                     filePattern="${deploy.dir}/var/log/traffic_router.log.%i" >
             <PatternLayout pattern="%-5p %d{yyyy-MM-dd'T'HH:mm:ss.SSS} [%t] %c - %m%n" />
             <Policies>
                 <SizeBasedTriggeringPolicy size="100MB" />
             </Policies>
+            <DefaultRolloverStrategy max="1" />
             <ThresholdFilter level="ALL" />
         </RollingFile>
     </Appenders>