KALENDAR.PAS

KALENDAR.PAS uses the BIGNUM2.PAS unit, which is a slightly modified 
version of BIGNUM.PAS.  It finds out what day of the week any date entered 
into it falls on, even dates that are B.C.  So, you can calculate years of 
up to 32 digits long.

RECOMPILE BIGNUM2.PAS AFTER RENAMING IT BIGNUM.PAS.