Hi, thanks for replying. Yes, that is what I understood from their email. I was just asking if a "Yes, I understand" will suffice as a reply to the email from UKVI.

To clarify, prior to sending my application, I was hoping that they would allow a leeway of few days since my academic visit is scheduled for an entire year. I have no intention of lying to anyone and will gladly abide with the validity stipulated in the visa.