In modern English, certain (but not, or not yet, all) 'time-interval-in-which-event-occurs' adjuncts can be constructed apparently (1) without temporal prepositions or case inflections (as in I received the money this morning/yesterday/last Friday/this week/last month/this summer/this year, etc.). The same construction occurs, although not exactly in all the same cases, in modern Spanish, several other western IE languages, and Mandarin.
How common this construction is in Human Language, in general, I do not know, though. Could somebody here give me examples of languages - preferably IE ones, since I know virtually nothing about other language families - in which this 'bare NP adverbial' construction is also possible, and, especially, of languages, if any, in which it is not? (2)
(1) Please note my 'apparently': I am not saying that English or Spanish 'bare' NP time adjuncts are really 'bare' (i.e., lacking even 'covert' prepositions, phonetically null K(ase)-assigning functional heads,'inherent', lexically-conditioned Case-features, or whatever structural devices eventually account for their function and interpretation); all I meant to say is that at PF they seem to be mere uninflected NP's/DP's, rather than PP's, K(ase)P's, or Case-inflected NP's/DP's, and what I wanted to know is which other languages have this surface property and which, if any, do not. I know, though, that the question might be undecidable (for reasons briefly explained in note (2) below).
(2) Needless to say, the construction will be trivially impossible, by definition, in any language in which all 'bare NP' time adjuncts must carry overt case inflections (accusative, genitive, dative, instrumental,...), as might well be the case in German, Russian, Polish, Hungarian, Finnish,...Latin (but I am not sure whether, in such languages, literally all 'bare NP' adjuncts must be overtly inflected; maybe some needn't be). [Note that, at bottom, this uncertainty may turn into a theoretical issue, instead of a factual one, because the possibility cannot be discarded that even apparently uninflected NP's should after all covertly carry 'abstract' Case (e.g., whichever the 'default' Case may be in the corresponding language, say 'objective', in English). What's more, of course really 'bare' (here: prepositionless and caseless) NP's will be impossible on theoretical grounds if the 'Case Filter' is a correct principle of Human Language and applies to all NP's. However, even if it is, whether it must apply to all NP's, including (2nd. order) NP predicates, instead of just to argument NP's is unclear to me]. Such issues might make my question unanswerable, and I am ready to delete it if so considered, but my original intention was to leave them aside and just find out what other languages have 'bare NP' time adjuncts that seem caseless at 'surface structure/PF' and which, if any, prohibit them (possibly disregarding German, Polish, etc., if their 'bare NP' adverbials do, in fact, invariably require case-marked NP's, which, as I said, I do not know).