If "est time" means estimated time remaining for the current emergency maintenance, then maintenance was scheduled to be over 3 hours and 15 minutes ago, then 1 hour 15 minutes ago, and currently 45 minutes from now.
If you're talking the maintenance for october update, servers go down in 6 hours 45 minutes and are scheduled to be down for 5 hours. Realistically, I see myself finally getting the patch downloaded sometime Wednesday morning after work.