The siesta is a time of reduced energy and many by-laws restrict noisy activities during this period. It is interesting, however, to observe how the siesta expands as one moves south into the stronger sun. In northern Europe it is generally two hours: 1 p.m. to 3 p.m. In Italian cities it often extends from 12 noon to 4 p.m.; but in North Africa it runs to 5 p.m.

Schafer, Murray R, The Soundscape- Our Sonic E…, loc. 648