I don’t pray for the dead. To God, all time is now. So, the moment before death of any person who lived, is living or will live is now to God; as is every moment of their life. But, hey, that’s just me talking.
This type of discussion of time makes my head hurt at all the implications, but humans do have a limit, as the Psalmists' says:
Psalm 90:12
12 So teach us to number our days that we may get a heart of wisdom.