What is the ruling on praying 'Isha one hour after Maghrib due to its delayed time in summer, considering work and early rising?

The time for Isha prayer begins at the disappearance of the twilight's redness, and it is not permissible to perform it before its designated time. So, if an hour after Maghrib ensures the entry of Isha's time, then performing it at that point is permissible and valid; otherwise, it is not.