it seems, that this is a bug, see: https://issues.qgis.org/issues/17681

best regards
Stefan


Am 2017-12-18 15:26, schrieb Reginald:
hello,

I am calculating the age of persons with the expression builder.
My formulae looks like this:
year(age( to_date(now()) , "GDate" ))
The result looks alright for people who are younger than 68 years.
People who are born in 1949 or before get negative ages and the age goes
from -68 to -31 (for someone born in 1913)
What is wrong with my formulae?

Regards,






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