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{{languages|Match dates}}
Explanation of the date matching logic in Gramps
If the date is textual, the text of the date as entered is matched with the textual date.
If the date is a correct date, the dates are compared. If part of the date corresponds with part of the date you want to match with, the match is considered successful.
Special cases:
* [[Dates#Dual_Dated|mixed date]]: eg <abbr title="exempli gratia - Latin phrase meaning 'for example'">e.g.</abbr> 1735/6-12-12, as the meaning of this is 1736-12-12 in Gregorian calendar, 1736-12-12 is used with the above mentioned rules.
== Changing after/before/about range ==
The values for the typical ages at birth, between generations, etc., can be set in the {{man menu|Menu -> Edit -> Preferences -> [[Gramps_5.2_Wiki_Manual_-_Settings#Limits|Limits > Calculation limits]]}} tab or you can manually change it as described below. {{man warn|You can only change the following configuration file|<code>~/.gramps/gramps.ini</code><br><br>'''if Gramps is not running.'''}} The date ranges taken used by gramps Gramps are set by keys. These If not present these keys can be added to your <ttcode>~/.gramps/keysgramps.ini</ttcode> file. Eg<abbr title="exempli gratia - Latin phrase meaning 'for example'">e.g.</abbr>, you could add to the <tt>behavior</tt> group:
[behavior]
;;date-beforeabout-range=999950 ;;date-after-range=999950 ;;date-aboutbefore-range=1050
[behavior]
date-about-range=10
date-after-range=50
date-before-range=100
== See also ==
* [[Dates]]
[[Category:Gramps LogicHow do I...]]