Update the Date and Time in Ubuntu Operating System using commands. Command sudo date nnddhhmmyyyy.ss Description for Command nn is a two digit month, between 01 to 12. dd is a two digit day, between 01 and 31, with the regular rules for days according to month and year applying. hh is two digit hour, using the 24-hour period so it is between 00 and 23. mm is two digit minute, between 00 and 59. yyyy is the year; it can be two digit or four digit: your choice. I prefer to use four digit years whenever I can for better clarity and less confusion. ss is two digit seconds. Notice the period ‘.’ before the ss. Example Let’s say you want to set your computer’s new time to December 6, 2013, 22:43:55, then you would use: sudo date 120622432013.55