Time: Read and Write 12- and 24-hour Time . 24-hour time is a system of representing time that refers to the full 24 hours in one day. Some professions use 24-hour time to reduce ambiguity between whether a time is morning or afternoon e.g. military, airline companies and medicine. . Timetables are often written using 24-hour time to avoid confusion between whether a time is in the morning or the afternoon. 24-hour time can use a colon to separate the hours and minutes (and seconds if included).

80K views · 1.5K reactions | #OnThisDay 1924: The 'pips' (aka the Greenwich Time Signal) began, soon to become an iconic part of radio's soundscape. Find out more about their interesting history here: https://www.bbc.com/historyofthebbc/anniversaries/february/the-pips/ | BBC Archive | Facebook