The time you can see through the appropriate section of the online services once you have submitted the plan of studies. To know the time in other subjects, other instalments or to review it before submitting the first to submit the plan, you can use the site of the Posters of the Studies, which displays the time through the appropriate feature custom time (which you can find on the left side of the page). For more information: https://www.polimi.it/strumenti/orario-lezioni/