sp_whoisactive time columns I am looking at data captured with the help of sp_whoisactive. 

session_id: 1016
blocked_session_count: 24
Login_time : 29/03/2018  12:14:59
tran_start_time : 29/03/2018  12:14:59
start_time: 29/03/2018  12:15:59
status: sleeping
open_tran_count :1


The login_time and tran_start_time are the same for this session_id.
But start_time is after a minute.

Does this mean the session entered sleeping state @ 29/03/2018  12:15:59 ??

Thank you :)
[tran_start_time] - Date and time that the first transaction opened by a session caused a transaction log write to occur.

[start_time] -  For active requests, shows the time the request started |   For sleeping sessions, shows the time the last batch completed  

[login_time] -  Shows the time that the session connected