periodicals should not include day

[jacobmerson]

Periodicals should list the month and year, but should not include the day. Conference proceedings, patents, etc. do include the day.

See the ieee reference guide page

[josephwright]

@moewew Is there a simple 'date format per entry type' function? I don't remember one ...

[moewew]

Unfortunately, there is no interface yet for per-type date settings. I looked at this a while ago, but there were difficulties with the interface as well as a possible implementation. Thoughts are always welcome. See plk/biblatex#863.

For now you can use the internal implementation of the date formats, e.g. https://github.com/michal-h21/biblatex-iso690/blob/86fd078483eabd7ee929a872a309547a1ecc5179/iso.bbx#L512-L515 or https://tex.stackexchange.com/a/419719/35864 (look for \changedateformat). Of course this uses internals which may not be as stable as a simple option.

If you only need to get rid of the day for some types you can of course use the old \clearfield approach.

[josephwright]

@moewew Thanks: what I thought

I'm reluctant to 'force' dropping of data by adding \clearfield to the style - that's irreversible so users can't override it (say if they have a newspaper article or similar that does need the day). Probably therefore one for the docs: a lot of people will only have the day in when they need it anyway.