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CALC 1 Date Keys

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CALC 1 has the following keys for date calculations:

DATE key'

Calculates a date by adding x days to the date in y (YYYYMMDD) and the day of the week(0 = Sunday) in y.

DATE Key Example

Calculate the date 100 days after Feb 25, 2015.

Value Keystrokes Display Description
150225 = (CHN, ALG)
ENTER (RPN)
150225.00 Enters Feb 25, 2015 in YYMMDD format
100 shift DATE 20150605.00 Displays June 6, 2015 in YYYYMMDD format
  SWAP 5.00 Displays the day of the week, 5 = Friday.

 

The History Detail will give you the formatted dates:

Calculation of Date
 150225.00 : Start Date: Wed Feb 25 2015
 100.00 : Days to add.
 20150605.00 : Calculated Date:Fri Jun 05 2015

ΔDYS key

Calculates the number of actual days from date y to date x. The base 360 days to y.

ΔDYS Key Example

Calculate the number of days between March 15 and July 1 of the current year.

Value Keystrokes Display Description
315 = (CHN, ALG)
ENTER (RPN, CHN)
315.00 Enters March 15 of the current year in YYMMDD format. Since the year is not entered, the current year is used.
701 shift + ΔDYS 108.00 Enters July 1 of the current year.
Then calculates the number of days between the dates.
108 actual days
  SWAP 106.00 106 base 30/360 days.

 

The History Detail will give you the formatted dates:

 Calculation of Days Between Dates
     315.00 : Start Date: Thu Mar 15 2018
     701.00 : End Date:   Sun Jul 01 2018
     106.00 : Number of Days, 360.
     108.00 : Number of Days, Actual.

Date Entry

CALC 1 uses the ISO 8601 YYYYMMDD format for entering dates. This is a common date format that most users around the world are familiar with.

For example, April 28, 2004 is entered as 40428. June 4, 2018 is entered as 180604.

An entry of 0 will use the current date.

Date Entry Shortcuts

If you omit the first two years (the century) of YYYY, CALC 1 will use the current century, 20. This is a common truncated representation.

If you omit the entire YYYY, CALC 1 will use the current year.

Using the "long press" gesture will display a hint about any key. (Video: Displaying a hint) .