This clock can be set in two ways - either by just clicking on it, or by setting it 'manually'. To set it manually you type the hour followed by ‘h’, and then the minutes followed by ‘m’. For example, if it is 2:08 you type ‘2h’ then ‘8m’. If it is 10:30 you type ‘10h’ followed by ‘30m’. At one minute to midnight, you type ‘11h’ (or ‘23h’) then ‘59m’, and so forth. The clock will continue to show the correct time for as long as you have the window open and active, but note that if others join the room with the clock in it after you have set it, they will see the default time until you set it in their presence.