The list is up-to-date (excluding holidays that always fall on a Sunday):
Unusual provision regarding the running of deadlines: "Days on which the offices of the cantonal administration are closed all day are also considered public holidays within the meaning of this provision."
[SEG 17]
The consequence is that, although it is not actually a public holiday, the deadline is nevertheless extended by that day (if the end of the deadline falls on it), for example, due to such a compensation day and the resulting closure of the cantonal administration's offices.
E.g.: Decision of the Cantonal Court BL of 30.07.2024 (810 24 153), E. 4.1, available at:
https://entscheidsuche.ch/view/BL_KG_003_810-2024-153_2024-07-30
Holidays as in the CETS No. 076 list