lassie% ls
cal-funcs.c   lib/          mycal7.c      sep/
cal-funcs.o   mycal6.c      mycal7.o      thanks.c
calendar.h    mycal6.txt    mycal7.txt    thanks.txt
lassie%
lassie% cc201 thanks.c cal-funcs.o
lassie% ls
a.out*       calendar.h   mycal6.txt   mycal7.txt   thanks.o
cal-funcs.c  lib/         mycal7.c     sep/         thanks.txt
cal-funcs.o  mycal6.c     mycal7.o     thanks.c
lassie% a.out
year =? 1992

In 1992, Thanksgiving is on November 26.

   November 1992
 Su  M Tu  W Th  F Sa
  1  2  3  4  5  6  7
  8  9 10 11 12 13 14
 15 16 17 18 19 20 21
 22 23 24 25 26 27 28
 29 30
lassie%
lassie% a.out
year =? 1994

In 1994, Thanksgiving is on November 24.

   November 1994
 Su  M Tu  W Th  F Sa
        1  2  3  4  5
  6  7  8  9 10 11 12
 13 14 15 16 17 18 19
 20 21 22 23 24 25 26
 27 28 29 30
lassie% 
lassie% a.out
year =? 1998

In 1998, Thanksgiving is on November 26.

   November 1998
 Su  M Tu  W Th  F Sa
  1  2  3  4  5  6  7
  8  9 10 11 12 13 14
 15 16 17 18 19 20 21
 22 23 24 25 26 27 28
 29 30