Package: catdoc Version: 1:0.95-5 Debian distribution: bookworm Linux 5.16.0-3-amd64 #1 SMP PREEMPT Debian 5.16.11-1 (2022-02-25) x86_64 GNU/Linux libc6 2.33-7 xls file with a column of dates (german format) with the content: 01.01.2000 01.01.2010 01.01.2020 xls2csv converting to tab separated file and date in iso format: $ xls2csv -c $'\t' -q 0 -f '%Y-%m-%d' dates.xls > dates.tsv the resulting file contains: $ cat dates.tsv 2004-01-02 2014-01-02 2024-01-02 All converted dates got added 4 years and 1 day Thank you Best wishes
