The Commonwealth of Novum Lux uses decimal time, a system of time originating from the French Revolution. In decimal time, days are divided into ten hours, each hour contains 100 minutes, and each minute contains 100 seconds.
The main advantage of a decimal time system is that, since the base used to divide the time is the same as the one used to represent it, the whole time representation can be handled as a single string. Therefore, it becomes simpler to interpret a timestamp and to perform conversions. For instance, 1:20:00 is 1 decimal hour and 23 decimal minutes, or 1.20 hours, or 120 minutes.
This property also makes it straightforward to represent a timestamp as a fractional day, so that 27.04.2017.05.20.00 can be interpreted as five decimal hours and 20 decimal minutes after the start of that day, or 0.520 (52%) of a day through that day. It also adjusts well to digital time representation using epochs, in that the internal time representation can be used directly both for computation and for user-facing display.
Calendars are organized in a similar way to clocks. Rather than dividing years based on the revolution around the sun or the lunar cycle, a year is represented as 100 days. There are no months, and every ten days is a week. Therefore, there are ten weeks in every year, and 100 days. The days of he week are as follows:
Prima, Duoda, Trida, Quartida, Sextida, Septida, Octida, Nonida, and Decada.
Years are numbers from the start of the "Anno Dimini" portion of the Gregorian Calendar. From this year (01 Jan 2017) to the start of "Anno Dimini" is 736400 days. If each decimal year is 100 days, then we are in the year 7364. The decimal calendar in the Kingdom uses "Anno Primo", or AP, instead of "Anno Dimini". Anno Primo means "the first year" in Latin.
Let's say today's date in the Gregorian calendar is 27 04 2017 at 12:00 PM UTC. In the Decimal Calendar of the Kingdom, it is 7364.46.05.00.00. The first number is the year (7364), the second number is the day (46), the third number is the hour (05). the fourth and fifth are the minutes and seconds respectively (0).
Just think, if you are 20 years old in the Gregorian calendar, that means you are about 7300 days old. That would make you 73 years old in the Decimal Calendar. This can often lead to some confusion among foreigners who ask Novum Luxans how old they are.