完成学业后有60天的时间准备离境，或者申请转学。
这个60天理论上是从你课程结束那天开始计算，或者是20表终止那天，哪个在先用哪个。
对你来讲，就是从5月7日开始。
从5月7号开始的60天内，你还可以合法居留在美国，
但一旦离境，就不能再用现在的F1签证回来美国了。
kobebryanyao 这位朋友，和您探讨一下，我没到
移民局网上查，下边这个是从UC Berkeley 官网上摘抄的：
“Your I-20 Completion Date
A "completion date" was entered into item #5 on page 1 of your I-20 based on your particular major and degree level. This is an estimate of time the University feels it may take you to fulfill all degree requirements. However, if you are not able to finish your program on that date, you must request an extension from the Berkeley International Office office at least one month before the completion date expires.
According to
U.S. immigration regulations, the "completion date" is defined as the day you complete your final degree requirements. Your actual completion date may not necessarily be the day of your graduation ceremony or the date on your I-20 (In fact, many students actually finish their degree requirements before the completion date on their I-20).
Undergraduate Students:
Your completion date is considered to be the last day of final exams of the semester your degree requirements are fulfilled.
Graduate Students:
Your completion date is the day on which all degree requirements are fulfilled, such as filing the thesis or dissertation in the Graduate Division. If you do not have a research component to your degree program (such as in the MBA program or other professional schools), your completion date would be the last day of final exams of the semester your degree requirements are fulfilled. “
所以，这个60天还是从5月7号（其实是5月8号了，因为7号是你考试的最后一天）开始计算。