Hi, the zdump.8.txt file generated from the current github code says: -c [loyear,]hiyear ... Cutoffs are at the start of each year, where the lower-bound timestamp is *exclusive* and the upper is *inclusive*; for example, -c 1970,2070 selects transitions after 1970-01-01 00:00:00 UTC and on or before 2070-01-01 00:00:00 UTC. The default cutoff is -500,2500. and $ ./zdump -V -c 2021,2022 Europe/Berlin Europe/Berlin Sun Mar 28 00:59:59 2021 UT = Sun Mar 28 01:59:59 .. Europe/Berlin Sun Mar 28 01:00:00 2021 UT = Sun Mar 28 03:00:00 .. Europe/Berlin Sun Oct 31 00:59:59 2021 UT = Sun Oct 31 02:59:59 .. Europe/Berlin Sun Oct 31 01:00:00 2021 UT = Sun Oct 31 02:00:00 .. (lines shorted to avoid line-wrapping) So the lower year is *inclusive* and the upper year is *exclusive*, and from my understanding these words should be swapped in the text of the man page. Or am I missing something? If I'm correct, should I provide a patch or pull request for the git repo? Martin -- Martin Burnicki Senior Software Engineer MEINBERG Funkuhren GmbH & Co. KG Email: martin.burnicki@meinberg.de Phone: +49 5281 9309-414 Linkedin: https://www.linkedin.com/in/martinburnicki/ Lange Wand 9, 31812 Bad Pyrmont, Germany Amtsgericht Hannover 17HRA 100322 Geschäftsführer/Managing Directors: Günter Meinberg, Werner Meinberg, Andre Hartmann, Heiko Gerstung Websites: https://www.meinberg.de https://www.meinbergglobal.com Training: https://www.meinberg.academy