Cryptanalysis

Hi guys,
Quick question:
I was wondering if I should actually test every second of every day of December or just day by day ?
Cause I’ve tried with days only and It doesn’t seem to work, so I really don’t know if It’s my program or the fact that I’m not trying each second.
Thanks for the help.

You can try to write a similar program yourself and see whether the seconds matter or not :)

You should try every second if you’ve decided to bruteforce