We generally inform Host Professors at least a couple of months before the start of an academic semester whether or not we can provide a JASP speaker.  Further, we generally notify Host Professors of the specific JASP Speaker assigned to their class about 1 month before the start of the academic semester; for example, in March before the start of the Spring semester in April, or in August before the start of the Fall semester in September.   Please note that if we receive a request to host a JASP Speaker sometime during a Spring semester (April-July), the earliest we can provide a Speaker is usually the following Fall semester (September-January).