TEXT(MONTH(DATEVALUE({!f_StartDateTimeWithTimeZoneOffset}))) & "/" &
TEXT(DAY(DATEVALUE({!f_StartDateTimeWithTimeZoneOffset}))) & "/" &
TEXT(YEAR(DATEVALUE({!f_StartDateTimeWithTimeZoneOffset}))) & " " &
IF(
    VALUE(MID(TEXT({!f_StartDateTimeWithTimeZoneOffset}), 12, 2)) = 0, 
    "12:" & 
    RIGHT("00" & MID(TEXT({!f_StartDateTimeWithTimeZoneOffset}), 15, 2), 2) & 
    " AM", 
    IF(
        VALUE(MID(TEXT({!f_StartDateTimeWithTimeZoneOffset}), 12, 2)) < 12,
        TEXT(VALUE(MID(TEXT({!f_StartDateTimeWithTimeZoneOffset}), 12, 2))) & ":" & 
        RIGHT("00" & MID(TEXT({!f_StartDateTimeWithTimeZoneOffset}), 15, 2), 2) & 
        " AM",
        IF(
            VALUE(MID(TEXT({!f_StartDateTimeWithTimeZoneOffset}), 12, 2)) = 12,
            "12:" & 
            RIGHT("00" & MID(TEXT({!f_StartDateTimeWithTimeZoneOffset}), 15, 2), 2) & 
            " PM",
            TEXT(VALUE(MID(TEXT({!f_StartDateTimeWithTimeZoneOffset}), 12, 2)) - 12) & ":" & 
            RIGHT("00" & MID(TEXT({!f_StartDateTimeWithTimeZoneOffset}), 15, 2), 2) & 
            " PM"
        )
    )
)