IIRC, elections in Italy are usually Sunday all day (from 7 a.m. to 10 p.m.) plus Monday morning (from 8 a.m. to 3 p.m.), or Saturday afternoon plus Sunday all day. I think the main group of people it biases against is those who like to go to the seaside for the weekend as soon as they can -- almost all people who stay in town could find some time to vote if they want to. OTOH, plenty of people (including) don't switch their legal residence when they rent an apartment to study in another town, so they'd have to go back to their parents' in order to vote. I study relatively close to where I grew up and my parents live so I go back home most weekends anyway, but students living further away from their home towns might be under-represented among voters. (I hear they can get free train tickets for that, though. I've never bothered to do that because train tickets from my home town to my university town and back are so cheap anyway.)