12:32 am UTC - twenty-eight minutes to one am UTC

Clock	Time	Spoken
12-hour clock	12:32 AM	twenty-eight minutes to one am, twelve thirty-two am, thirty-two minutes past midnight, thirty-two minutes past twelve am
24-hour clock	00:32	twenty-eight minutes to one, zero thirty-two, thirty-two minutes past midnight, thirty-two minutes past zero
Military	0032Z	zero-zero-three-two hours, zero zero thirty-two 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.