Currently, there is no built-in method of checking whether the current time is DST or not, which is necessary for determining UTC.
With the "{DST}" Token, one could calculate UTC using the existing tokens:
{EXP:{TIMEHOUR} - ({DST} + 5)} {TIMEMINUTE}
The alternative to this one new Token would be 4 new Tokens: "{timeUTC}", "{TIMEUTC}", "{HOURUTC}", and "{HOURUTC24}".