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General Operating Instructions
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For example, to find maturity date on a 120-day note issued May 6, 1973,
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| | Enter: | | | See Displayed: | | |
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sets rounding for 6 decimal places
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maturity date
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where:
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9.
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=
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9th month (September)
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03
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=
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day
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1973
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=
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year
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If you want to perform a subsequent date operation on the result in the display, be sure to press  SAVE first or you’ll get an error. Again, a logic or range error in a date entry
will cause the display to blink.
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Determining Day of the Week
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The day of the week (Mon., Tues., etc.) corresponding to future or past dates can be determined as follows:
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Enter known date, press SAVE .
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| 2. |
Enter today’s date, press DAY SAVE .
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| 3. |
Enter press ÷.
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Enter displayed number (omit decimal portion), press –.
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Enter 7 press × to get day factor.
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If the known date is in the future, count forward from today by the day
factor. For example, if today is Monday and the day factor is 6, the
future day would be Sunday. If the known date is in the past, count
backwards from today by the day factor.
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Suppose today is Monday, January 22, 1973 and you wanted to find out
what day it was when the stock market crashed on October 29, 1929,
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| | Enter: | | | See Displayed: | | |
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| 10.291929 SAVE 1.221973 DAY SAVE 7 ÷ | | | |
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day factor
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Today is Monday; count six days back to get Black Tuesday.
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