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Day of the week: Difference between revisions
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→old school DOW: re-installed original comment with dashes, not minuses. -- ~~~~
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end /*y*/
exit /*stick a fork in it, we're done.*/
/*──────────────────────────────────DOW (day of week) subroutine────────*/
dow: procedure; arg m,d,y; if m<3 then do; m=m+12; y=y-1; end
yL=left(y,2); yr=right(y,2); w=(d + (m+1)*26%10+yr+yr%4+yL%4+5*yL) // 7
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