11:27 pm UTC - eleven twenty-seven pm UTC

Clock	Time	Spoken
12-hour clock	11:27 PM	eleven twenty-seven pm, twenty-seven minutes past eleven pm, thirty-three minutes to midnight, thirty-three minutes to twelve am
24-hour clock	23:27	twenty-three twenty-seven, twenty-seven minutes past twenty-three, thirty-three minutes to midnight, thirty-three minutes to zero
Military	2327Z	two-three-two-seven hours, twenty-three twenty-seven hours

AM or A.M. - latin ante meridiem, meaning before midday, PM or P.M. - latin post meridiem, meaning after midday. Letter 'Z' in military time indicates ZULU Time Zone which is equivalent to UTC.