Apple will announce its financial results for the second quarter of 2016 on Monday, April 25, at 2 pm (Pacific). In January Apple provided the following guidance for the quarter:

Revenue between $50 billion and $53 billion;
Gross margin between 39% and 39.5%;
Operating expenses between $6 billion and $6.1 billion;
Other income/(expense) of $325 million;
A tax rate of 25.5%.