diff --git a/base/mf_fmtdttm.sas b/base/mf_fmtdttm.sas
index 477c0f3..1cd1aeb 100644
--- a/base/mf_fmtdttm.sas
+++ b/base/mf_fmtdttm.sas
@@ -5,9 +5,21 @@
   (https://datacontroller.io) deployments, the E8601DT26.6 datetime format has
   the widest support when it comes to pass-through SQL queries.
 
-  However, it is not supported in WPS or early versions of SAS 9 (M3 and below).
+  However, it is not supported in WPS or early versions of SAS 9 (M3 and below)
+  when used as a datetime literal, eg:
 
-  This macro will therefore return the appropriate format based on the runtime.
+      data _null_;
+        demo="%sysfunc(datetime(),E8601DT26.6)"dt;
+        demo=;
+      run;
+
+  This macro will therefore return DATEITME19.3 as an alternative format
+  based on the runtime environment so that it can be used in such cases, eg:
+
+      data _null_;
+        demo="%sysfunc(datetime(),%mf_fmtdttm())"dt;
+        demo=;
+      run;
 
   <h4> Related Macros </h4>
   @li mf_fmtdttm.test.sas
diff --git a/base/mp_lockanytable.sas b/base/mp_lockanytable.sas
index 40ce710..aa8c3ff 100644
--- a/base/mp_lockanytable.sas
+++ b/base/mp_lockanytable.sas
@@ -22,6 +22,7 @@
   @param [in] loop_secs= (1) Seconds to wait between each lock attempt
 
   <h4> SAS Macros </h4>
+  @li mf_fmtdttm.sas
   @li mp_abort.sas
   @li mp_lockfilecheck.sas
   @li mf_getuser.sas
@@ -111,7 +112,7 @@ run;
       LOCK_LIB ="&lib";
       LOCK_DS="&ds";
       LOCK_STATUS_CD='LOCKED';
-      LOCK_START_DTTM="%sysfunc(datetime(),E8601DT26.6)"dt;
+      LOCK_START_DTTM="%sysfunc(datetime(),%mf_fmtdttm())"dt;
       LOCK_USER_NM="&user";
       LOCK_PID="&sysjobid";
       LOCK_REF="&ref";
@@ -131,7 +132,7 @@ run;
     proc sql;
     update &ctl_ds
       set LOCK_STATUS_CD='LOCKED'
-        , LOCK_START_DTTM="%sysfunc(datetime(),E8601DT26.6)"dt
+        , LOCK_START_DTTM="%sysfunc(datetime(),%mf_fmtdttm())"dt
         , LOCK_USER_NM="&user"
         , LOCK_PID="&sysjobid"
         , LOCK_REF="&ref"
@@ -206,7 +207,7 @@ run;
     proc sql;
     update &ctl_ds
       set LOCK_STATUS_CD='UNLOCKED'
-        , LOCK_END_DTTM="%sysfunc(datetime(),E8601DT26.6)"dt
+        , LOCK_END_DTTM="%sysfunc(datetime(),%mf_fmtdttm())"dt
         , LOCK_USER_NM="&user"
         , LOCK_PID="&sysjobid"
         , LOCK_REF="&ref"
diff --git a/base/mp_retainedkey.sas b/base/mp_retainedkey.sas
index 8d183bd..bcebada 100644
--- a/base/mp_retainedkey.sas
+++ b/base/mp_retainedkey.sas
@@ -58,6 +58,7 @@
 
   <h4> SAS Macros </h4>
   @li mf_existvar.sas
+  @li mf_fmtdttm.sas
   @li mf_getquotedstr.sas
   @li mf_getuniquename.sas
   @li mf_nobs.sas
@@ -217,12 +218,12 @@ quit;
     set keytable="&base_libds"
       ,keycolumn="&retained_key"
       ,max_key=%eval(&maxkey+&newkey_cnt)
-      ,processed_dttm="%sysfunc(datetime(),E8601DT26.6)"dt;
+      ,processed_dttm="%sysfunc(datetime(),%mf_fmtdttm())"dt;
   %end;
   %else %do;
   update &maxkeytable
     set max_key=%eval(&maxkey+&newkey_cnt)
-      ,processed_dttm="%sysfunc(datetime(),E8601DT26.6)"dt
+      ,processed_dttm="%sysfunc(datetime(),%mf_fmtdttm())"dt
     where keytable="&base_libds";
   %end;
   %mp_lockanytable(UNLOCK