In Hebrew cataloging, dates of "publication" which include
months (or months and days) are considered to fall under
the
provisions of LCRI 2.7B9 on "dates of release or
transmittal." Since, as the RI says, these are not really
publication dates,
they're put in brackets in the 260 and notes are added giving the full
date.
This practice is not followed by all LC cataloging teams and CPSO
does not usually get involved in questions like this that concern "section
practice."