Time Is Not Constant
Humans are bound by the shadow moving on a sundial, but God is outside of that constraint. Humans do not have the power to change time, God extended time by a day in Joshua’s long day.
The feast at this time lasts for 7 days, but we know it is a 1000 year period. We will have the energy to serve at that time because God will jerk us out of these temporary bodies we are dwelling in. In the twinkling of an eye we will outside of time with boundless energy to serve Gods will.
Time is not constant, the bridegroom is almost at the door!