Italy is in the Central European Time Zone. Central European Standard Time (CET) is 1 hours ahead of Greenwich Mean Time (GMT+1). 

Like most states in Europe, Summer (Daylight-Saving) Time is observed in Italy, where the time is shifted forward by 1 hour;  2 hours ahead of Greenwich Mean Time (GMT+2).  

After the Summer months the time in Italy is shifted back by 1 hour to Central European Time (CET) or (GMT+1)

With your international mobile rental you can easily keep track of the time in the Italy.