>> unless the backend is able to use the time zone to accurately convert the UTC time to hour-of-day, including DST shenanigans and whatnot. Most mature date t

>> unless the backend is able to use the time zone to accurately convert the UTC time to hour-of-day, including DST shenanigans and whatnot. Most mature date time libs can handle DST automatically for you when you use "named" timezones. For example, Java can handle it properly.