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Directions

Select a month and a date. Enter a year.
Type the number of fortnights in the fortnights box and then click "Click to Calculate"
If you want to add weeks and/or days to the selected date then just type the number.
If you want to subtract fortnights from the selected date then type a minus sign or hyphen before the number.
If you want to subtract the number 2154 you may type "-2,154", you may type the comma. Type "-2,154".
If you want to type "256,678", but you type "25k,678", the computer will use "25678" to
calculate the date.
If you type "ghblxz", the computer will print "undefined, undefined NaN, NaN " there will be no answer.
NaN = not a number
If you type "1.9e2", the computer will use "190" to calculate the answer.
If you select "February 31", the computer will print "Not a Day"
To clear the entry boxes click "Reset".