Lower School Admissions: Accelerated Process for Kindergarten Siblings— Application Deadline is October 21. Milton families interested in applying a younger sibling for Kindergarten may take advantage of an accelerated timeline for the application process. Grades other than Kindergarten follow the standard application timeline. If you have not yet scheduled an interview, call our office as soon as possible (617-898-2509). The application deadline for the Early Kindergarten Process is October 21. Supplemental School Forms are due into our office by November 14.