Also see

- The Date Form Calculator for calculating actual days using date pickers.
- The DAYS Function Formula Calculator
- The DAYS360 Function Formula Calculator

CALC 1 has the following keys for date calculations:

Calculates a date by adding x days to the date in y (YYYYMMDD) and the day of the week(1 = Monday) in y.

Calculate the date 100 days after Feb 25, 2015.

Value | Keystrokes | Display | Description |
---|---|---|---|

shift + none | Sets the number format to "none". This can also be set in options. This is optional. | ||

150225 | = (CHN, ALG) ENTER (RPN, CHN) |
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. |

Tap shift then the "dec" key to return to decimal format.

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

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 (optional) | 106.00 | 106 base 30/360 days. SWAP is only needed in ALG mode or if you only have 1 line of the stack displayed. |

key will enter the current date in YYYMMDD format. This is useful for calculating days from the current date.

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.

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) You can inspect the Key Details to see the formulas and functions for any key.