strptime returns negative number in

[Cuonghuutran]

I have a drill-down in this dash board.

.....
eval Date=strftime(_time,"%m/%d/%Y")
....
table Date,queryHash........
......

strptime($row.Date$,"%m/%d/%Y)

http://xyz/HashIn=$row.queryHash$&form.timePicker.earliest=$startDate$

form.timePicker.earliest is set with negative number in the URL call.

Is it a problem with strptime() or $row.Date$ was not passed correctly to strptim() or something else?
Thanks.