@Dani-Hub Could you please take a look? Jens looked up the new subclause number in the table of contents.

I wonder whether referring to 5.3.4.1 alone is too limited. I suggested 5.3.4 because it contains both 5.3.4.1 and 5.3.4.2, where the latter additionally explains how to combine the time of day in the presence of a time shift between local time and UTC. But I acknowledge that this part may not be needed for %z.

where the latter additionally explains how to combine the time of day in the presence of a time shift between local time and UTC.

Nowhere do we discuss the combination in C++. %z just has the offset, which is defined in 5.3.4.1.

Great, thank you, both!