In formal and written language, the time of day is usually expressed using the 24-hour clock. Hours and minutes are separated using either a colon or a full stop.[3] Leading zeroes should only be used for minutes, except in tables, on electronic displays etc. In informal use, especially in speech, the 12-hour clock is used. However, instead of the English "a.m."/"p.m." system, descriptive phrases are used in cases of ambiguity, e.g. ujutro "in the morning", prijepodne "before noon", poslijepodne "afternoon", navečer "in the evening".
