12877 reached New Delhi at 11:00 AM on 11/05/2024.
02877 will reach around 02:00 AM on 12/05/2024.
But i dont why 02878 is delayed by 4 hrs and will depart at 04:00 AM on 12/05/2024. As both the train are sharing the rake, so the rake of 12877 which reached NDLS in the afternoon should hsve departed as 02878 special on time, & the rake of 02877 would have departed on Sunday evening as 12878.