Health Insurance Effective Date Rules
Enrollment of plan between 1st and 15th, then the effective date of coverage will be on the 1st of the following month.
Enrollment in a plan between the 16th and 30th/31st of the month, then the effective date of the newly selected plan is the 1st of the second following month.
The absolute last date a plan change can be made is the last day of Open Enrollment, 2/15/15.