DateCalculator

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Gramps-notes.png

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Date Calculator Gramplet - Default opening dialog

The Date Calculator Gramplet allows you to do date math.

Enter at least one valid date for Expression 1 and Expression 2 then click the Calculate button.

An expression can be:

  1. a valid Gramps date
  2. a positive or negative number (represents years)
  3. a positive or negative tuple (years, months, days)

Use the Clear button to start again.


Example usage

Date Calculator Gramplet - Example results

Assume that a headstone has only a date of death and age at death.

RANEY

MOTHER
Hannah M.

Wife of
William Raney

Died
Nov. 14, 1902
Aged

73Yrs. 4Mo.
& 3Ds.
Blessed are the dead
who die in the Lord
C051 raney w id794872.jpg

Source:
Iowa Gravestone
Photo Project

FATHER
William Raney

Died
Oct. 17, 1892
Aged

71 Yrs 2Mo
& 7Ds

I will behold thy face
in righteousness I shall
be satisfied when
I awake with thy likeness

Enter a date in each field in the following format ( YYYY-MM-DD ).

Expression 1

Enter a starting date or an offset value (such as the date of the most recent birthday on a marriage license):

for the wife in the example gravestone, enter 14 Nov 1902

Expression 2

an offset tuple is in the form y,m,d
Example for "Aged 73Yrs. 4Mo. & 3Ds.", use "- 73, 4, 3"
Note that only a single leading negative sign is needed to indicate a negative tuple.

Result

Pressing the Calculate button returns 1829-07-11. When storing a date that's been calculated from a reference rather than a historical record, it is hard to be certain what methodology was used. So the results are an estimate. Annotate this by preceding the value with "calc abt"

Gramps-notes.png
Initially, the Result field will contain the following usage hint:

Enter an expression in the entries above and click Calculate.

An expression can be:

1. a valid Gramps date
2. a positive or negative number, representing years
3. a positive or negative tuple, representing (years, months, days)

Note that at least one expression must be a date.


See also