The concept is interesting and creative but I also think it's just repackaging the problem it's trying to address but using a different element as the datum. This adds an additional step where you have to translate N:45 time to local by remembering how the letters are re-arranged for your specific area. Therefore, I don't think this solution really solves the original/intended problem it's trying to address but rather hides it behind the letters.

I'd suggest a good alternative is to just stick with Google Calendar/Microsoft Outlook and/or WorldTimeBuddy.