diff --git a/man/fill_template b/man/fill_template
index 368cb1b0..3e5efc4e 100644
--- a/man/fill_template
+++ b/man/fill_template
@@ -1,11 +1,11 @@
 #!/bin/sh
 d=""
-[ -z "$SOURCE_DATE_EPOCH" ] || d=--date=@$SOURCE_DATE_EPOCH
+[ -z "$SOURCE_DATE_EPOCH" ] || d="-u --date=@$SOURCE_DATE_EPOCH"
 
-if [ "$2" == "True" ]; then
+if [ "$2" = "True" ]; then
   for i in *.0 ; do
-    sed -e "s/!VERSION!/${1}/g" -e "s/!DATE!/`date $d '+%B %Y'`/g" < ${i} > ${i%%0}1
+    sed -e "s/!VERSION!/${1}/g" -e "s/!DATE!/`date $d '+%Y-%m-%d'`/g" < ${i} > ${i%%0}1
   done
 else
-  sed -e "s/!VERSION!/${1}/g" -e "s/!DATE!/`date $d '+%B %Y'`/g" < jackd.0 > jackd.1
+  sed -e "s/!VERSION!/${1}/g" -e "s/!DATE!/`date $d '+%Y-%m-%d'`/g" < jackd.0 > jackd.1
 fi