“CMS defines the General Enrollment Period (GEP) is January 1 through March 31 of each year. If you enroll in Premium Part A or Part B during the General Enrollment Period, your coverage starts on July 1.” – www.medicare.gov

“…is a period from Jan 1 – Mar 31, where you can apply for your Part A and B of Medicare if you missed your initial enrollment period, with coverage effective July 1.”