This is only a humble question, because I was not at all able to find out when the gurus travel and when they are in India. They just do what they want. They do not think of their students everywhere in the world. "You must come to India and then you shall see if they are there or not," that's what I was told.
The gurus need a manager. He or she can make the schedule for the guru and announce it via Internet in advance for all the students in the world. Spontaneity/moods is something for students or divas not for gurus. They must be available. :)