By opting out this field, the exact date will be automatically get set when the form is submitted.
By opting out this field, the exact date will be set automatically when the form is submitted.
By opting out this field, form submission date will be set automatically.

මට කියන්න ඕන වෙලා තියෙන්නෙ බන්.
මේ ෆීල්ඩ් එක මගහැරියොත් ඩේට් එක ඔටෝ සෙට් වෙනව ෆෝම් එක සබ්මිට් වෙන වෙලාවට කියල.
If this field is opt-out, date will be set automatically when the form gets submitted.

By opting out this field, form submission date will be set automatically.
A nicer form would be...(passive voice)By opting out this field, date will be automatically set to the time of form submission
