Is there no way for a member to select their timezone when they are visiting a board in a different country ? or is there a MOD that can be used to allow them to change their timezone so they can view the board in their own timezone setting ?

It's not tied to a user's computer or browser settings?

Found something. If you look at a member in the ACP and go to edit settings for that member, there is a toggle that says "Set Timezone Automatically":

Maybe it's something the user selects when he signs up?

The user's timezone automatically matches their device, and will update if it changes. So if you have your computer/phone/etc set to set its time zone automatically, you don't need to do anything when travelling.

Good to know thanks everyone