Delayed members-only membership

You would need to use some custom code to schedule people to change levels on a specific date.

Set up a “holding level” with enddate on a specific date (for your example on 4/14). Then code things so when you “expire” from the holding level, you are given “real level” with the right end date.

This add on allows you to set specific start and end dates on a level:
https://www.paidmembershipspro.com/add-ons/plugins-on-github/subscription-delays/

This code recipe demonstrates how to change a level on expiration:
https://www.paidmembershipspro.com/2013/08/change-membership-level-on-cancellation-or-expiration/

If you need support with the above, please open a topic on our members forum: https://www.paidmembershipspro.com/forums/forum/members-forum/