Question about Verizon N/W minutes

i have a question regarding n/w minute start times when traveling with verizon service. here in the central time zone my night minutes start at 9pm central. now if i travel to california when would my night minutes start there. would they start at 7pm pacific time (9pm central) or would it be 9pm pacific time? i guess i am asking does it stick to your time zone or does it adapt to the time zone you are in? thanks for the help everyone.

[Celloman]

NW minutes are billed based on the zone from which your phone is used. If you're in California, they start at 9pm local time, which would be 11pm in Chicago (for example). They don't stick to your home time zone.