Hello, I have been working with the database lately and have had issues to read Morocco rules. I tried to look in the archives of the mailing list but didn't find my answer. Currently the database contains these bits: Rule Morocco 2017 only - Jul 2 2:00 1:00 - Rule Morocco 2018 only - May 13 3:00 0 - Rule Morocco 2018 only - Jun 17 2:00 1:00 - Rule Morocco 2019 only - May 5 3:00 -1:00 - Rule Morocco 2019 only - Jun 9 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26 0:00 Morocco +00/+01 1984 Mar 16 1:00 - +01 1986 0:00 Morocco +00/+01 2018 Oct 28 3:00 1:00 Morocco +01/+00 I wonder if the database should add this rule dated to the switching to permanent DST: Rule Morocco 2018 only - Oct 28 3:00 0 - Or am I missing an implicit rule: being that a new zone change discard any current rule (here Morocco 2018 only - Jun 17 2:00 1:00 - )? Thanks for any clarification, Maxime Vinzio