{blog-posts} time-parameter should accept exact date (e.g. time=/2007/07/15)

In our environment blog-posts are used to collect the inputs for various newsletters, some of which are published daily, others weekly. The different newsletters are identified by labels, the most recent edition is displayed by a page containing something similar to

.
It is required to be able to link directly to archived versions of newsletters; however, since news for several different newsletters can be posted on one specific date (not only those belonging to one selected newsletter) it is not sufficient to just use the link-format e.g. [/2007/07/15].
I would therefore suggest to extend the accepted format for the time-parameter such that also pprecise dates can be used.
I would furthermore appreciate if this change could also we applied to other macros using time as a selection criterion (e.g. search).