Promotion notice says offer ends "10/31/2021 23:59pm (UTC-6)".

Do they actually mean Colorado & Alberta time? This is a relatively low population zone, so it's a strange choice, and so a bit hard to believe.

On the other hand UTC+6 is Bangladesh & Kyrgyzstan time, which is also a bizarre choice.

FT, you should state the city or country along with the UTC value. I can't be the only one confused.