diff --git a/basis/calendar/calendar.factor b/basis/calendar/calendar.factor
index 5cdeb527bb..e2564b5a28 100644
--- a/basis/calendar/calendar.factor
+++ b/basis/calendar/calendar.factor
@@ -180,7 +180,7 @@ M: real +year ( timestamp n -- timestamp )
     12 /rem dup zero? [ drop 1- 12 ] when swap ; inline
 
 M: integer +month ( timestamp n -- timestamp )
-    [ over month>> + months/years >r >>month r> +year ] unless-zero ;
+    [ over month>> + months/years [ >>month ] dip +year ] unless-zero ;
 
 M: real +month ( timestamp n -- timestamp )
     [ float>whole-part swapd average-month * +day swap +month ] unless-zero ;
@@ -188,7 +188,7 @@ M: real +month ( timestamp n -- timestamp )
 M: integer +day ( timestamp n -- timestamp )
     [
         over >date< julian-day-number + julian-day-number>date
-        >r >r >>year r> >>month r> >>day
+        [ >>year ] [ >>month ] [ >>day ] tri*
     ] unless-zero ;
 
 M: real +day ( timestamp n -- timestamp )
@@ -198,7 +198,7 @@ M: real +day ( timestamp n -- timestamp )
     24 /rem swap ;
 
 M: integer +hour ( timestamp n -- timestamp )
-    [ over hour>> + hours/days >r >>hour r> +day ] unless-zero ;
+    [ over hour>> + hours/days [ >>hour ] dip +day ] unless-zero ;
 
 M: real +hour ( timestamp n -- timestamp )
     float>whole-part swapd 60 * +minute swap +hour ;
@@ -207,7 +207,7 @@ M: real +hour ( timestamp n -- timestamp )
     60 /rem swap ;
 
 M: integer +minute ( timestamp n -- timestamp )
-    [ over minute>> + minutes/hours >r >>minute r> +hour ] unless-zero ;
+    [ over minute>> + minutes/hours [ >>minute ] dip +hour ] unless-zero ;
 
 M: real +minute ( timestamp n -- timestamp )
     [ float>whole-part swapd 60 * +second swap +minute ] unless-zero ;
@@ -216,7 +216,7 @@ M: real +minute ( timestamp n -- timestamp )
     60 /rem swap >integer ;
 
 M: number +second ( timestamp n -- timestamp )
-    [ over second>> + seconds/minutes >r >>second r> +minute ] unless-zero ;
+    [ over second>> + seconds/minutes [ >>second ] dip +minute ] unless-zero ;
 
 : (time+)
     [ second>> +second ] keep
@@ -233,7 +233,7 @@ PRIVATE>
 GENERIC# time+ 1 ( time1 time2 -- time3 )
 
 M: timestamp time+
-    >r clone r> (time+) drop ;
+    [ clone ] dip (time+) drop ;
 
 M: duration time+
     dup timestamp? [
@@ -291,7 +291,7 @@ M: timestamp <=> ( ts1 ts2 -- n )
 : (time-) ( timestamp timestamp -- n )
     [ >gmt ] bi@
     [ [ >date< julian-day-number ] bi@ - 86400 * ] 2keep
-    [ >time< >r >r 3600 * r> 60 * r> + + ] bi@ - + ;
+    [ >time< [ [ 3600 * ] [ 60 * ] bi* ] dip + + ] bi@ - + ;
 
 M: timestamp time-
     #! Exact calendar-time difference
@@ -327,13 +327,13 @@ M: duration time-
     1970 1 1 0 0 0 instant <timestamp> ;
 
 : millis>timestamp ( x -- timestamp )
-    >r unix-1970 r> milliseconds time+ ;
+    [ unix-1970 ] dip milliseconds time+ ;
 
 : timestamp>millis ( timestamp -- n )
     unix-1970 (time-) 1000 * >integer ;
 
 : micros>timestamp ( x -- timestamp )
-    >r unix-1970 r> microseconds time+ ;
+    [ unix-1970 ] dip microseconds time+ ;
 
 : timestamp>micros ( timestamp -- n )
     unix-1970 (time-) 1000000 * >integer ;
@@ -350,10 +350,11 @@ M: duration time-
     #! Zeller Congruence
     #! http://web.textfiles.com/computers/formulas.txt
     #! good for any date since October 15, 1582
-    >r dup 2 <= [ 12 + >r 1- r> ] when
-    >r dup [ 4 /i + ] keep [ 100 /i - ] keep 400 /i + r>
-        [ 1+ 3 * 5 /i + ] keep 2 * + r>
-    1+ + 7 mod ;
+    [
+        dup 2 <= [ [ 1- ] [ 12 + ] bi* ] when
+        [ dup [ 4 /i + ] keep [ 100 /i - ] keep 400 /i + ] dip
+        [ 1+ 3 * 5 /i + ] keep 2 * +
+    ] dip 1+ + 7 mod ;
 
 GENERIC: days-in-year ( obj -- n )