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Hi Hans, you pass the wrong argument (#1 instead of #2) to the Lua function for the \date command. \def\syst_converters_date[#1][#2]% {\dontleavehmode \begingroup \scratchcounterone \normalyear \scratchcountertwo \normalmonth \scratchcounterthree\normalday \iffirstargument \letdummyparameter\c!y\empty \letdummyparameter\c!m\empty \letdummyparameter\c!d\empty \getdummyparameters[#1]% \edef\temp{\dummyparameter\c!y}\ifx\temp\empty\else\scratchcounterone \temp\fi \edef\temp{\dummyparameter\c!m}\ifx\temp\empty\else\scratchcountertwo \temp\fi \edef\temp{\dummyparameter\c!d}\ifx\temp\empty\else\scratchcounterthree\temp\fi \relax \fi \the\everycurrentdate \clf_currentdate - {#1}{\currentdatespecification}{\labellanguage}% + {#2}{\currentdatespecification}{\labellanguage}% \scratchcounterone\scratchcountertwo\scratchcounterthree \endgroup} Wolfgang