Temporal adpositions

In English, three different prepositions are used when referring to things taking place at a certain moment in time: 'in', 'on', and 'at'. Each preposition is associated with a different range of temporal moments:

year;  in ('in 1999')
season: in ('in spring')
month: in ('in May')
day part: in ('in the afternoon')
day: on ('on Tuesday')
time: at ('at 9am')

How is this in your language? Does it lump together things that English doesn't, or does it make distinctions that do not exist in English? can you give examples?

I'm planning to use the results to teach my students about conceptual space / semantic maps.