A workman prepares metallic calenders specifying months, dates and days in the form of monthly sheets (one plate for each month). How many types of February calenders should be prepare to serve for all possibilities in the future years?

A mint prepares metallic calendars specifying months, dates and days in the form of monthly sheets (one plate for each month). How many types of February calendars should it prepare to serve for all the possibilities in the future years ?