Until this point in time (8)
'until this point in time' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for to date that I've seen before include "Reason suitor's come" , "Amorous American's aim," , "Thus far" , "Up until today" , "Until this point in time" .)
(Other definitions for hitherto that I've seen before include "So far" , "Up to this time" , "Up to this point" , "Up till now" , "Heretofore (8" .)