First day with students

For the last two days I have spend getting to know my school, arranging my classroom, shopping for supplies and being reassured that everything will be just fine.  The students arrive today, I'm not sure what to expect.  I am quite uneasy being that we have no schedule for the day (other than two half hour breaks, on in the morning, one in the afternoon) and the fact that we are unsure of how many students to expect due to the Ramadan holiday.  I am sure it will be just fine, thinking about it is always harder than just living it.