When catching the train you expect it to be on time. Like, exactly on schedule, precise to the minute. For yourself to be on time, you probably want to arrive five minutes early at the platform though. When meeting friends there is more leeway: You might be a little early or a little late, it will count as on time, no worries. For some friends don’t be too late though. When photographing the sunrise, as early as possible is on time. There is always a lot to explore and setting up compositions requires care. When approaching a job interview, being on time is being late. You need to be there five to ten minutes earlier than the appointment. But don’t be too early either. Being on time is difficult. So, when is ‘on time’ for a four year project? An hour before deadline? A week? A month?