Just don't care and use them. People understand them. Maybe they're not used to hearing it, but it doesn't matter. This is what I do and never cam across someone who was so dense that he didn't understand me. I also never had someone tell me that it was strange to do so.
If it weren't so ingrained, I would be permanently using YYYY-MM-DD instead of DD/MM/YYYY.
Works great for east Asia, and it sorts!
I'd also like to advocate for using 24 time in speech.
See you at 21 tomorrow :)
Just don't care and use them. People understand them. Maybe they're not used to hearing it, but it doesn't matter. This is what I do and never cam across someone who was so dense that he didn't understand me. I also never had someone tell me that it was strange to do so.