         "July" "August" "September" "October" "November" "December"
     }
 
-: month-name ( n -- string )
-    check-month 1 - month-names nth ;
+<PRIVATE
+
+: (month-name) ( n -- string ) 1 - month-names nth ;
+
+PRIVATE>
+
+GENERIC: month-name ( obj -- string )
+
+M: integer month-name check-month 1 - month-names nth ;
+M: timestamp month-name month>> 1 - month-names nth ;
 
 CONSTANT: month-abbreviations
     {

M: timestamp <=> ( ts1 ts2 -- n )
    [ >gmt tuple-slots ] compare ;

: (time-) ( timestamp timestamp -- n )
    [ >gmt ] bi@
    [ [ >date< julian-day-number ] bi@ - 86400 * ] 2keep

: friday ( timestamp -- new-timestamp ) 5 day-this-week ;
: saturday ( timestamp -- new-timestamp ) 6 day-this-week ;

: sunday? ( timestamp -- ? ) day-of-week 0 = ;
: monday? ( timestamp -- ? ) day-of-week 1 = ;
: tuesday? ( timestamp -- ? ) day-of-week 2 = ;
: wednesday? ( timestamp -- ? ) day-of-week 3 = ;
: thursday? ( timestamp -- ? ) day-of-week 4 = ;
: friday? ( timestamp -- ? ) day-of-week 5 = ;
: saturday? ( timestamp -- ? ) day-of-week 6 = ;

: sunday-of-month ( timestamp n -- new-timestamp ) 0 nth-day-this-month ;
: monday-of-month ( timestamp n -- new-timestamp ) 1 nth-day-this-month ;
: tuesday-of-month ( timestamp n -- new-timestamp ) 2 nth-day-this-month ;
