I must admit I was not aware that it was regional settings issue.
Me neither. It was an actual question, not a suggestion so I should have made that more clear. You might be right but I have little interest in testing it by changing my settings.
OK, a quick look tells me it's an Outlook option that you have to set so that either works. Apparently, commas are used in other email apps.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.