User blog comment:Dragonjet/KC3改/@comment-122.62.160.48-20151010202226/@comment-1820055-20151011043919

You can keep your local timezone.

However, people on JST tend to get into the game earlier than those who are not - after a maintenance. That's why the recommendation if one has still been getting maintenance screen to switch to JST and it will work.

So basically timezone is irrelevant to KC3改 but only player preference.

For spending money, it is generally recommended not to use any viewer, and additionally to use VPN for non-credit cards, because other options will not show up otherwise. If using a credit card though, never use VPN.