Like FIFA Manager, we should see a calendar which contains month and weeks. each day can be 3 hours and x minutes in real time and after each day, players get 6% condition. so you can decide on which day it should be a friendly match or an events (like fifa manager) camping somewhere, open day, family day, discussion or etc. and in free weeks you can have friendly matches.
Also you set training for each day.
knowing about your future games and planning for about a month is on of the benefits of a calendar.