Is my MEV visa still valid if my return flight was rescheduled to the day after the enter before date?

Hello everyone.

I have a MEV visa and i'm an italian citizen.

These are my visa details:

Date of issue: 28/08/2018

Enter before: 27/02/2019

Total of 183 days (!!)

First question.. My visa will be consider valid according to the dates printed in the visa passaport, or is going to be consider valid only from the date of issue + 180 days?

Second question.. I had my return flight from maldives on feb 26th that has been rescheduled on feb 27th. Will my visa still be valid? In other words, the dates printed in my visa have the same value as the usal 2 months stamp (23.59 of the printed day)?

Thanks in advance.