There's a difference between the table from JoS and the actual hours. At least for me.
Ex: I live in Europe GTM +2 , and I have to add ~ 25 minutes.
I, personally, use Planetary Times and if you have an Android, you can download it, give your city and follow it. This also shows planetary days in upper right, counting down till the next day, it calculates the hours for later days if you want to plan on doing a specific working and so on. Just don't put your birth date in the third section.