RosettaCodeData/Task/Calendar/Icon/calendar.icon

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procedure main(A)
printCalendar(\A[1]|1969)
end
procedure printCalendar(year) #: Print a 3 column x 80 char calendar
cols := 3 # fixed width
mons := [] # table of months
"January February March April May June " ||
"July August September October November December " ?
while put(mons, tab(find(" "))) do move(1)
write(center("[Snoopy Picture]",cols * 24 + 4)) # mandatory ..
write(center(year,cols * 24 + 4), "\n") # ... headers
M := list(cols) # coexpr container
every mon := 0 to 9 by cols do { # go through months by cols
writes(" ")
every i := 1 to cols do {
writes(center(mons[mon+i],24)) # header months
M[i] := create CalendarFormatWeek(year,mon + i) # formatting coexpr
}
write()
every 1 to 7 do { # 1 to max rows
every c := 1 to cols do { # for each column
writes(" ")
every 1 to 7 do writes(right(@M[c],3)) # each row day element
}
write()
}
}
return
end
link datetime
procedure CalendarFormatWeek(year,m) #: Format Week for Calendar
static D
initial D := [31,28,31,30,31,30,31,31,30,31,30,31]
every suspend "Su"|"Mo"|"Tu"|"We"|"Th"|"Fr"|"Sa" # header
every 1 to (d := (julian(m,1,year)+1)%7) do suspend "" # lead day alignment
every suspend 1 to D[m] do d +:= 1 # days
if m = 2 & IsLeapYear(year) then suspend (d +:= 1, 29) # LY adjustment
every d to (6*7) do suspend "" # trailer alignment
end