This app was mentioned in 4 comments, with an average of 0.50 upvotes
You can also use this App (for Android), World Clock which even let's you set multiple alarm all for different time zones, & can even have Clocks based on UTC alone if not countries...
PST/PDT (San Francisco) is local time zone for NA Server. EST/EDT is local time zone for EU Server. AS, KR & JP Server follows JST (Tokyo) I think. UTC is for all around Global stuffs, unless for certain events it's divided by their respective local time zones...
I think EU follows UTC BUTT I'm not sure coz I mostly heard of EST, so any EU player might confirm this...
timeanddate_com
App: https://play.google.com/store/apps/details?id=com.timeanddate.worldclock
Web site: https://www.timeanddate.com/worldclock/
i use this app: https://play.google.com/store/apps/details?id=com.timeanddate.worldclock
this will allow you to add a second time