Tz/tzdata not maintained

Does somebody know how to get in touch with the maintainers of tz/tzdata? They seem to be Hungarian and worked together in an organization called Nilcons. The latest tzdata has a version that suggests it uses the IANA tzdb from October 2020. So it hasn’t been updated for more than a year.

Furthermore, I would like to get in touch with other users of these packages so that we can coordinate. I was thinking of applying to take over maintainership but Oleg Grenrus advised me against it. But if the authors do not respond before March, I think I’ll apply for the maintainership since it would be nice to have an updated timezone database before Daylight Savings Time starts.

My first PRs were submitted in November 2021 and I still have not received any replies: Pull requests · nilcons/haskell-tzdata · GitHub

I’d welcome any advice! If any highly trusted member of the community wants to take over maintainership, of course that would be even better. I am not maintaining any packages yet, so I may lack the experience. These packages are moderately popular: tzdata had 136 downloads in the last month, according to Hackage.


According to Taking over a package you are doing everything correctly (i.e. “State your intention to take over the package in a public forum”). Now it is time to wait a bit and then — if nothing moves — contact hackage admins.


I recommend not using the compiled-in database. I use loadSystemTZ (from the tz package) to get zone information from the system database. That way, I don’t have to rebuild my application to take advantage of tzdata updates, which sometimes come in quite late before the next DST change.