SUMMARY It is not possible to use YYYY if your locale doesn't support it. As discussed here (https://mail.kde.org/pipermail/kmymoney/2020-August/003527.html), KMyMoney should provide a default, unambiguous date format. Currently the displayed date format is based on the QT environment settings. There are a number of problems with this: 1. Your locale may set a format as MM-DD-YY. Which leads to the well know date ambiguity. 2. With a two digit year it's impossible to enter date earlier than 1990. 3. If your locale displays DD-MM-YY, but you really want DD-MM-YYYY, than your only option is to change the LC_TIME environment variable to something which uses this short ISO-8601 YYYY format. But this also changes the date picker. So now you can't read the days and months anymore, because they are in a language you don't speak. Ideally, for financial applications there should not be a dependency on the locale of the system it is running on. There should be a short list of formats you can choose from (example: DD-MM-YY, DD-MM-YYYY, MM-DD-YY, MM-DD-YYYY) which are documented and consistent regardless of environment.
Git commit 7e1fdb6b63c8b6c7a07d2732049842674b9e4134 by Thomas Baumgart. Committed on 25/03/2023 at 14:29. Pushed by tbaumgart into branch 'master'. Use consistent date format throughout the application The format still relies on the current locale, but a central location in the code is now used which provides a consistent 4 digit year format for dates. M +8 -7 kmymoney/dialogs/kcurrencycalculator.cpp M +2 -1 kmymoney/dialogs/kmymoneypricedlg.cpp M +1 -0 kmymoney/kmymoney.cpp M +5 -4 kmymoney/mymoney/mymoneyfile.cpp M +36 -8 kmymoney/mymoney/mymoneyutils.cpp M +5 -1 kmymoney/mymoney/mymoneyutils.h M +4 -4 kmymoney/mymoney/storage/onlinejobsmodel.cpp M +2 -1 kmymoney/mymoney/storage/pricemodel.cpp M +1 -1 kmymoney/plugins/checkprinting/checkprinting.cpp M +3 -3 kmymoney/plugins/views/forecast/kforecastview_p.h M +7 -7 kmymoney/plugins/views/onlinejoboutbox/konlinetransferform.cpp M +7 -6 kmymoney/plugins/views/reports/core/listtable.cpp M +6 -8 kmymoney/plugins/views/reports/core/reporttable.cpp M +14 -13 kmymoney/plugins/views/reports/core/tests/querytable-test.cpp M +2 -2 kmymoney/plugins/views/reports/kreportsview_p.h M +3 -2 kmymoney/views/keditscheduledlg.cpp M +2 -3 kmymoney/views/khomeview_p.h M +1 -1 kmymoney/views/kscheduledview_p.h M +7 -6 kmymoney/widgets/kmymoneybriefschedule.cpp M +7 -4 kmymoney/wizards/newaccountwizard/kaccountsummarypage.cpp M +6 -4 kmymoney/wizards/newloanwizard/effectivedatewizardpage.cpp M +11 -9 kmymoney/wizards/newloanwizard/keditloanwizard.cpp M +3 -1 kmymoney/wizards/newloanwizard/summaryeditwizardpage.cpp M +3 -2 kmymoney/wizards/newloanwizard/summarywizardpage.cpp https://invent.kde.org/office/kmymoney/commit/7e1fdb6b63c8b6c7a07d2732049842674b9e4134