How exactly do you need to date your hardcore Character?

So the Blizzard post tells the following:

" You are solely responsible for confirming the equivalent start and end dates and times in your relevant jurisdiction."

Does this mean I have to date the creation of my Character exactly on point of time (for example: 4th June at 18:34 o´clock) or is it enough to just say it was created on June 4th and finished at June 20th (still an example, I can´t travel in time :stuck_out_tongue: )

Appreciate your information since I didn´t find an answer for that question

Link to the Blizz Post if someone is looking for: