Simple Math:
Join Date
01-05-2011
Total Posts
978
Today's date: 07-07-13; Time 3 pm edt
Days since joining = 915
Posts per day = 978/915 = 1.069 post/day
1000 - 978 = 22 post to go
22 post to go / 1.069 post/day = 20.58 days
20.58 days = 20 days; 14 hours
Today's date: 07-07-13; Time 3 pm edt + 20 days; 14 hours =
07-28-13; 5 am edt
(......... and yes, I had nothing better to do this afternoon

)